Christianity and the Doctrine of the Just War

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Just War Theory in Christian Tradition

The Christian doctrine of Just War developed as an attempt to reconcile the biblical call to peace with the realities of political authority, self-defense, and the protection of innocent life. Beginning with the writings of Augustine and later refined by Thomas Aquinas, the tradition established moral principles intended to limit rather than encourage warfare. Over many centuries these ideas influenced Christian theology, international law, military ethics, and humanitarian law.

The collected sources examine both supporters and critics of Just War Theory. They explore the historical evolution of Christian thinking, the continuing witness of Christian pacifism, denominational perspectives, modern warfare, nuclear weapons, humanitarian intervention, and emerging challenges such as cyberwarfare, autonomous weapons, and drone strikes.

Historical Development

The earliest Christians often expressed deep suspicion toward military service, emphasizing Jesus' teachings on loving enemies and rejecting violence. Following Constantine's conversion and Christianity's integration into imperial government, Christian leaders increasingly confronted questions of governing, defense, and public order.

Augustine laid the foundations of Just War Theory by arguing that force could sometimes be used to restore justice and peace when motivated by love rather than hatred. Thomas Aquinas later organized these ideas into the classic requirements of legitimate authority, just cause, and right intention. Medieval thinkers including Francisco de Vitoria, Francisco Suárez, Hugo Grotius, and the School of Salamanca expanded these principles into broader theories of natural law and international relations.

Core Principles of Just War

Classical Christian Just War Theory evaluates both the decision to enter war (*jus ad bellum*) and conduct during war (*jus in bello*). Among its principal requirements are:

  • Legitimate authority
  • Just cause
  • Right intention
  • Last resort
  • Probability of success
  • Proportionality
  • Discrimination between combatants and civilians

These principles seek to ensure that military force remains morally restrained and directed toward restoring peace rather than achieving conquest, revenge, or political domination.

Christian Traditions and Denominational Perspectives

The material surveys a broad range of Christian traditions.

The Roman Catholic Church continues to affirm strict Just War criteria while increasingly emphasizing nonviolence, peacebuilding, humanitarian responsibility, and the moral dangers posed by modern warfare.

Eastern Orthodoxy generally views war as a tragic consequence of human sin rather than something that can ever be fully righteous. Even defensive warfare is often accompanied by calls for repentance and reconciliation.

Many Protestant traditions accept Just War principles while differing in how biblical teachings should shape military service and political responsibility. Lutheran, Reformed, Anglican, Methodist, Baptist, Presbyterian, and evangelical perspectives each offer distinct interpretations.

Historic Peace Churches—including Mennonites, Quakers, and the Church of the Brethren—reject participation in warfare altogether and advocate Christian nonviolence, conscientious objection, and active peacemaking.

Christian Pacifism and Critiques

Numerous scholars argue that Jesus' teachings on enemy love, forgiveness, and nonviolence cannot be fully reconciled with organized warfare. Christian pacifists contend that Just War Theory often becomes a mechanism for justifying conflicts that fail to satisfy its own demanding standards.

Modern theologians such as Stanley Hauerwas, William T. Cavanaugh, Thomas Merton, John Howard Yoder, and others question whether technological warfare, nationalism, and modern states have rendered classical Just War Theory increasingly difficult—or even impossible—to apply faithfully.

Modern Warfare and Emerging Challenges

Recent scholarship explores the application of Christian ethics to contemporary military technologies and geopolitical conflicts, including:

  • Drone warfare
  • Autonomous weapons
  • Cyberwarfare
  • Chemical and biological weapons
  • Nuclear deterrence
  • Humanitarian intervention
  • Responsibility to Protect (R2P)
  • Civilian protection
  • War crimes
  • Moral injury
  • Command responsibility
  • Transitional justice

These discussions demonstrate that traditional principles continue to shape debates over increasingly complex forms of warfare.

Christianity and International Humanitarian Law

Many Just War principles influenced the development of modern international humanitarian law. The Geneva Conventions, protections for prisoners of war, prohibitions against targeting civilians, proportionality requirements, and restrictions on certain weapons closely parallel longstanding Christian ethical concerns.

International organizations such as the International Committee of the Red Cross, the United Nations, the International Criminal Court, and numerous humanitarian institutions continue to apply legal standards that overlap with historic Christian moral reasoning about warfare.

Nuclear Weapons and Just Peace

One of the strongest themes within contemporary Christian ethics concerns nuclear weapons. Recent Catholic teaching, statements by Pope Francis, ecumenical organizations, and many Protestant denominations increasingly argue that nuclear deterrence and the possession of nuclear weapons present profound moral challenges.

Many theologians advocate moving beyond the traditional language of Just War toward the broader concept of Just Peace, emphasizing conflict prevention, diplomacy, reconciliation, restorative justice, and long-term peacebuilding.

Continuing Debate

Just War Theory remains one of Christianity's most influential and contested ethical traditions. Some scholars maintain that it provides indispensable moral restraints upon political power and military force. Others argue that its strict standards are rarely satisfied in practice and that Christian discipleship should instead emphasize nonviolence and peacemaking.

Contemporary debates continue to address terrorism, humanitarian intervention, nationalism, religious violence, technological warfare, civilian protection, and the ethical responsibilities of governments, churches, and individual soldiers.

Conclusion

The collected sources demonstrate that Christian thinking about war has never been static. From the early church to the present, Christians have wrestled with balancing justice, mercy, political responsibility, and the sanctity of human life. Just War Theory emerged as an effort to restrain violence through moral limits, while Christian pacifism continues to challenge believers to pursue peace through nonviolent witness. Together these traditions remain central to ongoing discussions about military ethics, international law, humanitarian protection, and the pursuit of a more just and peaceful world.



Foundations and Principles

Why Just War Theory Is Not Enough

| Alexandre A. Martins | Church Life Journal | 2026-06-23] Just-war reasoning cannot be separated from broader duties of solidarity, humanitarian assistance, and protection of people facing extreme need. The article draws upon Thomas Aquinas to argue that Christian ethics requires active responses to suffering before crises escalate into armed conflict.

Miscellaneous

An Augustinian Warning About War and Domination

| Miles Pattenden | ABC Religion & Ethics | 2026-05-19] Augustine’s idea of the lust for domination provides a framework for questioning the ambitions concealed beneath claims of national defense. The article connects Augustinian theology with contemporary debates about war, political power, and Christian responsibility.

The Great and Terrible Meaning of War

| Rachel Mann | The Christian Century | 2026-04-20] War reflects humanity’s failure to create peaceful communities, yet soldiers and civilians caught within it continue to search for meaning. The article considers how Christian theology can acknowledge sacrifice and courage without glorifying organized violence.

Foundations and Principles

Just War, Holy War, and the Crisis of Moral Language

| Stephen Chavura | ABC Religion & Ethics | 2026-04-12] Christian just-war reasoning seeks to restrain violence, while the language of holy war can sacralize violence and portray enemies as beyond ordinary moral concern. The article explains why distinguishing limited warfare from divinely mandated warfare remains essential.

Miscellaneous

There Is No Holy War

Robert P. Jones | The Christian Century | 2026-03-30] Christians should reject efforts to describe contemporary military campaigns as sacred or directly authorized by God. The article argues that war must remain an occasion for moral scrutiny, lament, and repentance rather than religious celebration.

The Church Cannot Bless War

Various Christian clergy and theologians | The Christian Century | 2025-06-27] Christian churches should resist religious rhetoric that portrays military action as sacred, inevitable, or divinely authorized. The authors maintain that even Christians who accept just-war doctrine must carefully examine proportionality, civilian protection, and whether military force is genuinely necessary.

Historical Development

Hugo Grotius and the Laws of War

Encyclopedia of Philosophy | 2025-05-05] Grotius drew upon Christian theology, natural law, Roman law, and earlier just-war thinkers to formulate rules governing warfare. His work helped establish that even enemies remain bound by common moral and legal obligations.

Foundations and Principles

=====Discrimination Between Combatants and Civilians===== * [https://www.icrc.org/en/document/ihl-rules-of-war International Committee of the Red Cross | “Rules of War” | ICRC | 2025-04-08] Christian just war teaching has strongly influenced the idea that civilians should not be intentionally targeted. This principle later became embedded in modern international humanitarian law.

=====The Continuing Debate Over Just War===== * [https://theconversation.com/us/topics/just-war-14715 The Conversation | “Just War” | The Conversation | 2025-03-22] Contemporary Christian ethicists continue to debate whether modern technologies, nuclear weapons, terrorism, cyberwarfare, and drone strikes have rendered traditional just war principles inadequate or even impossible to satisfy.

Human Flourishing and the Bombing of Civilians

| Jennifer A. Frey | Church Life Journal | 2025-03-20] The hypothetical bombing of civilians exposes tensions between consequentialist calculations and absolute moral prohibitions. Christian ethics asks whether intentionally killing innocent people can ever be justified by predictions that it may shorten a war.

=====What Counts as a Just Cause?===== * [https://www.britannica.com/topic/just-war Encyclopaedia Britannica | “Just War” | Encyclopaedia Britannica | 2025-02-03] Christian thinkers generally argue that wars may only be fought to resist aggression, defend innocent life, or restore justice. Economic gain, revenge, or territorial expansion are traditionally rejected as legitimate causes.

=====Probability of Success===== * [https://www.britannica.com/topic/just-war Encyclopaedia Britannica | “Just War” | Encyclopaedia Britannica | 2025-02-03] Many Christian formulations include the requirement that military action have a reasonable chance of achieving its just objectives. Futile wars that merely increase suffering are considered morally irresponsible.

=====The Crusades and Just War Reasoning===== * [https://www.worldhistory.org/Crusades/ World History Encyclopedia | “The Crusades” | World History Encyclopedia | 2025-01-18] Medieval defenders often invoked just war concepts to justify the Crusades, while later scholars have debated whether these conflicts actually satisfied the doctrine’s moral requirements or represented significant departures from it.

=====Thomas Aquinas and the Conditions for Just War===== * [https://www.britannica.com/biography/Saint-Thomas-Aquinas Encyclopaedia Britannica | “Thomas Aquinas” | Encyclopaedia Britannica | 2025-01-14] Aquinas summarized the classic requirements for a just war, including legitimate authority, just cause, and right intention. His treatment in the ‘’Summa Theologica’’ became one of the most influential statements of Christian ethics concerning warfare.

=====Christian Pacifists and Critiques of Just War===== * [https://www.britannica.com/topic/pacifism Encyclopaedia Britannica | “Pacifism” | Encyclopaedia Britannica | 2024-10-02] Christian pacifists argue that Jesus’ teachings on loving enemies and rejecting violence are incompatible with participation in warfare. They contend that the just war tradition compromises the radical ethics of the Gospel.

=====Eastern Orthodox Perspectives on Just War===== * [https://orthodoxwiki.org/War OrthodoxWiki | “War” | OrthodoxWiki | 2024-06-18] Eastern Orthodoxy has generally viewed war as a tragic necessity rather than something inherently just. Soldiers may be honored for defending others while still being encouraged to undertake repentance for taking human life.

War and a Just Peace in Ukraine

| George Weigel | Church Life Journal | 2024-06-11] The defense of Ukraine is presented as a struggle against aggression and tyranny rather than merely a dispute over territory. The article uses Christian principles of human dignity, political freedom, and just peace to defend resistance to invasion.

=====Biblical Foundations of Just War===== * [https://www.gotquestions.org/just-war-theory.html GotQuestions.org | “What is the Christian just war theory?” | GotQuestions.org | 2024-05-06] Christian supporters of just war appeal to biblical passages describing governments bearing the sword to restrain evil while balancing these texts with Jesus’ commands to love enemies. The resulting interpretation attempts to reconcile justice with mercy.

=====Just War Theory in Christian Tradition===== * [https://plato.stanford.edu/entries/war/ Stanford Encyclopedia of Philosophy | “War” | Stanford Encyclopedia of Philosophy | 2024-03-20] Just War Theory examines the moral conditions under which Christians and others have argued that war may be justified. It traces principles such as just cause, legitimate authority, proportionality, and discrimination between combatants and civilians, while exploring debates over whether any war can satisfy these standards.

=====Jus ad Bellum and Jus in Bello===== * [https://plato.stanford.edu/entries/war/ Stanford Encyclopedia of Philosophy | “War” | Stanford Encyclopedia of Philosophy | 2024-03-20] Christian just war thought distinguishes between the justice of entering a war and the justice of conduct during war. A nation may begin a conflict for legitimate reasons yet still fight it in immoral ways.

Modern Applications

The Ethics of Humanitarian Intervention

Stanford Encyclopedia of Philosophy | 2024-03-20] Humanitarian intervention may be defended when governments perpetrate or fail to prevent mass atrocities. Critics question whether outside powers possess legitimate authority, reliable motives, or the capacity to avoid worsening the conflict.

Foundations and Principles

The Moral Equality of Combatants

Stanford Encyclopedia of Philosophy | 2024-03-20] Traditional just-war theory often treats ordinary soldiers on opposing sides as morally equal if they obey the rules of combat. Revisionist theorists argue that soldiers fighting an unjust war may lack the same permission to kill defenders.

Miscellaneous

Supreme Emergency and Civilian Bombing

Stanford Encyclopedia of Philosophy | 2024-03-20] The idea of supreme emergency asks whether an extraordinary threat can justify actions normally prohibited, including attacks upon civilians. Christian critics warn that exceptions of this kind may destroy the moral limits just-war doctrine exists to defend.

Historical Development

=====Constantine and the Christian Empire===== * [https://www.worldhistory.org/Constantine_the_Great/ World History Encyclopedia | “Constantine the Great” | World History Encyclopedia | 2024-02-15] Constantine’s conversion dramatically altered Christianity’s relationship with political power. As Christians assumed governmental responsibilities, theologians increasingly confronted questions about military service, defense, and the ethical limits of warfare.

Foundations and Principles

Augustine on Peace and the Earthly City

Weithman | Stanford Encyclopedia of Philosophy | 2024-02-06] Augustine regarded peace as the proper objective of political action even when coercion became tragically necessary. His distinction between ordered peace and domination shaped later Christian accounts of legitimate authority and justified warfare.

=====Last Resort in Christian Teaching===== * [https://www.usccb.org/issues-and-action/human-life-and-dignity/war-and-peace United States Conference of Catholic Bishops | “War and Peace” | USCCB | 2024-01-30] Christian doctrine generally holds that military force should only be used after peaceful alternatives have been seriously attempted. Diplomacy, negotiation, and sanctions are expected to precede armed conflict whenever possible.

=====Protestant Approaches to Just War===== * [https://www.thegospelcoalition.org/article/what-is-just-war-theory/ The Gospel Coalition | “What Is Just War Theory?” | The Gospel Coalition | 2023-11-14] Many Protestant traditions have accepted the classical just war framework while debating how biblical teachings on forgiveness, justice, and governmental authority should shape decisions about military intervention.

=====Right Intention and Moral Motivation===== * [https://www.catholic.com/encyclopedia/war Catholic Encyclopedia | “War” | Catholic Encyclopedia | 2023-11-01] Even if a conflict meets legal criteria, Christian ethics insists that the motives behind military action matter. The pursuit of peace and justice rather than hatred or domination is considered essential for moral legitimacy.

=====Legitimate Authority in Christian Ethics===== * [https://ethicsunwrapped.utexas.edu/glossary/just-war Ethics Unwrapped | “Just War Theory” | University of Texas at Austin | 2023-10-04] One of the central principles of just war doctrine is that only properly constituted public authorities may declare war. The requirement seeks to prevent private vengeance and unauthorized violence.

=====Augustine and the Birth of Christian Just War Thought===== * [https://iep.utm.edu/augustin/ Internet Encyclopedia of Philosophy | “Saint Augustine” | Internet Encyclopedia of Philosophy | 2023-08-18] Augustine transformed earlier Christian attitudes toward violence by arguing that war could be morally permissible when undertaken to restore justice and peace rather than out of hatred or conquest. His writings became the foundation for later Christian just war doctrine.

The Doctrine of Double Effect

Stanford Encyclopedia of Philosophy | 2023-05-15] Double-effect reasoning distinguishes intended harm from foreseeable but unintended harm. In warfare, the doctrine is frequently used to evaluate attacks on military targets that may also endanger civilians.

Miscellaneous

The Church and the State’s Judgment About War

| William T. Cavanaugh | Church Life Journal | 2023-03-06] Churches should not allow political leaders to possess exclusive authority over judgments about the morality of war. The article argues that Christian communities must retain the independence necessary to criticize state violence and national idolatry.

Historical Development

Francisco de Vitoria and the Law of War

Encyclopedia of Philosophy | 2023-02-06] Vitoria applied Christian natural-law reasoning to conquest, colonialism, indigenous rights, and international relations. He rejected several religious and imperial claims used to justify Spanish warfare while leaving other controversial grounds for intervention.

Francisco Suárez and International Law

Stanford Encyclopedia of Philosophy | 2022-12-19] Suárez developed ideas about political authority, natural law, and relations among sovereign communities. His work helped transform medieval Christian just-war theory into a more systematic account of international law.

Foundations and Principles

Drew Christiansen on Nonviolence and Just War

| Eli S. McCarthy | Berkley Center for Religion, Peace, and World Affairs | 2022-11-30] Jesuit ethicist Drew Christiansen viewed nonviolence and just-war reasoning as complementary rather than mutually exclusive. A strong commitment to nonviolent action can make requirements such as last resort and civilian protection more demanding.

=====Proportionality in Christian Just War===== * [https://www.crf-usa.org/bill-of-rights-in-action/bria-18-3-c-the-just-war-theory Constitutional Rights Foundation | “The Just War Theory” | Constitutional Rights Foundation | 2022-09-12] The principle of proportionality requires that the expected benefits of military action outweigh the harm it causes. Christian ethicists argue that excessive destruction undermines the moral justification for war.

Modern Applications

Just-War Theory and the Ethics of Drone Warfare

| Christopher Lamont | Berkley Center for Religion, Peace, and World Affairs | 2022-04-28] Drone warfare raises difficult questions about civilian casualties, national sovereignty, accountability, and the psychological distance between combatants and their targets. The article considers how Christian just-war principles might guide more restrictive and transparent policies for using remotely controlled weapons.

Miscellaneous

The Russian World Teaching and War

| Paul D. Miller | Christianity Today | 2022-03-17] The article examines how religious nationalism can transform war into a defense of sacred civilization. Such ideology conflicts with just-war restrictions by weakening moral concern for enemies and encouraging expansive claims of political authority.

Denominational Perspectives

The Orthodox Church and the Blessing of War

| Orthodox Christian Theologians | Public Orthodoxy | 2022-03-13] Orthodox scholars reject theological ideologies that merge Christianity, nationalism, and imperial expansion. The declaration challenges religious efforts to bless aggressive war or present a particular state as the unique guardian of Christian civilization.

Pope Francis on Dialogue Between Generations

| Pope Francis | Vatican | 2021-12-08] Education, work, and intergenerational dialogue are described as instruments for building durable peace. The message broadens Christian reflection beyond battlefield ethics to the social conditions that prevent violence.

Miscellaneous

Autonomous Weapons and Human Judgment

| International Committee of the Red Cross | ICRC | 2021-05-12] Autonomous weapons may reduce meaningful human control over decisions to kill. Christian just-war analysis asks whether machines can adequately distinguish targets, assess proportionality, and preserve moral accountability.

Reinhold Niebuhr and Political Responsibility

Stanford Encyclopedia of Philosophy | 2021-04-15] Niebuhr rejected both moral idealism and uncritical militarism, stressing that political action always involves power and imperfect choices. His thought deeply influenced modern Christian debates about war, democracy, responsibility, and coercion.

Foundations and Principles

Pope Francis on Fraternity and Peace

| Pope Francis | Vatican | 2020-12-08] A culture of care offers an alternative to nationalism, indifference, and militarization. The message emphasizes protection of human dignity, solidarity with vulnerable people, and peaceful resolution of disputes.

Miscellaneous

‘’Fratelli Tutti’’ on the Failure of War

| Pope Francis | Vatican | 2020-10-03] Pope Francis argues that modern warfare makes traditional claims of justification increasingly difficult to sustain. Civilian destruction, misinformation, technological escalation, and long-term consequences require a renewed commitment to peacemaking.

Environmental Destruction During War

| International Committee of the Red Cross | ICRC | 2020-09-25] Warfare can contaminate soil and water, destroy ecosystems, and endanger future generations. Christian proportionality analysis increasingly considers environmental damage as part of the foreseeable cost of military operations.

The Church’s Historical Failure of Social Love

| R. R. Reno | Church Life Journal | 2020-06-02] Political power can become an idol when Christians treat the state as the ultimate source of order and salvation. The article emphasizes that Christian political engagement must remain subordinate to the church’s universal communion and transcendent purpose.

Foundations and Principles

Just Peace and Nuclear Disarmament

| Alexandre A. Martins | Berkley Center for Religion, Peace, and World Affairs | 2020-02-13] Nuclear weapons appear incompatible with discrimination and proportionality because their destructive effects cannot be reliably limited. The article proposes a Christian ethic of just peace that emphasizes disarmament and prevention rather than management of warfare.

Denominational Perspectives

Eastern Orthodoxy and the Tragedy of War

| Ecumenical Patriarchate | Greek Orthodox Archdiocese of America | 2020] Orthodox social teaching describes war as a tragic consequence of sin rather than an inherently righteous activity. Defensive force may sometimes be tolerated, but Christians must seek reconciliation and reject nationalism, cruelty, and vengeance.

Pope Francis at Hiroshima

| Pope Francis | Vatican | 2019-11-24] At Hiroshima, Pope Francis condemned both the use and possession of nuclear weapons. His message emphasizes remembrance, reconciliation, and the incompatibility of nuclear terror with lasting peace.

Pope Francis at Nagasaki

| Pope Francis | Vatican | 2019-11-24] The address challenges nuclear deterrence and the diversion of resources toward weapons capable of destroying entire populations. It presents disarmament as a moral duty rather than merely a strategic preference.

Modern Applications

Terrorism, War, and the Problem of Religious Violence

| William T. Cavanaugh | ABC Religion & Ethics | 2019-10-30] Christianity has included early pacifist traditions, later just-war doctrines, and religious arguments used to legitimize state violence. The article questions simplistic distinctions between supposedly religious violence and supposedly rational or secular warfare.

Foundations and Principles

Being a Just Soldier in an Unjust War

| Robert Parham | Christian Ethics Today | 2019-05-06] Soldiers may face profound moral dilemmas when political leaders initiate a war whose justification is doubtful or later collapses. The article explores individual conscience, obedience, preemptive warfare, and whether honorable military conduct is possible within an unjust conflict.

Miscellaneous

Obama, War, and Christianity

| Miguel A. De La Torre | Christian Ethics Today | 2019-05-06] The article evaluates American warfare, targeted killings, and drone operations through Christian moral principles. It argues that just-war doctrine was designed to restrict warfare rather than provide automatic religious approval for military policies.

Thomas Merton, the Problem of War, and Christian Nonviolence

| Gregory K. Hillis | ABC Religion & Ethics | 2019-01-28] Thomas Merton accepted Catholic just-war teaching while becoming increasingly doubtful that modern warfare could satisfy its requirements. His reflections on nuclear weapons, conscientious objection, and nonviolence illustrate tensions within twentieth-century Catholic ethics.

Historical Development

The First Crusade and Holy War

History Encyclopedia | 2018-07-09] The First Crusade was preached as an armed pilgrimage to assist Eastern Christians and recover sacred territory. Its religious promises demonstrate how warfare could move beyond restraint and become a path to spiritual reward.

Miscellaneous

The Douma Attacks from a Just-War Perspective

| James Turner Johnson | Berkley Center for Religion, Peace, and World Affairs | 2018-05-14] The use of chemical weapons raises questions about prohibited means, punishment, deterrence, and legitimate authority. The article evaluates military responses to chemical attacks through historical and contemporary just-war standards.

Modern Applications

The Holy See on Nuclear Disarmament

| Pope Francis | Vatican | 2017-11-10] Pope Francis argues that nuclear weapons create a false sense of security and threaten humanity with catastrophic destruction. He calls for integral disarmament grounded in human dignity, development, and peaceful international cooperation.

Denominational Perspectives

Pope Francis on Nonviolence as a Political Style

| Pope Francis | Vatican | 2016-12-08] Active nonviolence is presented as a practical method for resisting injustice and transforming conflict. The message calls Christians, governments, and communities to replace retaliation with negotiation, reconciliation, and restorative action.

Miscellaneous

How Not to Be a Good American

| Stanley Hauerwas | ABC Religion & Ethics | 2016-10-19] Christians should not allow nationalism to determine which wars they regard as righteous. The article criticizes the tendency to portray military intervention as a selfless defense of freedom while overlooking strategic interests, arrogance, and the destruction experienced by other societies.

Modern Applications

The Morality of Drone Warfare

| Brian Stiltner | The Christian Century | 2016-05-25] This review examines Christian ethical analysis of targeted killing and unmanned aerial warfare. It considers discrimination, proportionality, accountability, secrecy, and whether drone operations make the political decision to use lethal force dangerously easy.

Foundations and Principles

The End of Just War

| Stanley Hauerwas | ABC Religion & Ethics | 2016-04-25] Christian realism should lead churches toward nonviolence rather than accommodation with warfare. Hauerwas contends that war functions as a rival moral community demanding sacrifice, loyalty, and identities that properly belong to the Christian church.

Miscellaneous

The Eucharist and the End of War

| William T. Cavanaugh | ABC Religion & Ethics | 2016-01-18] Christian worship forms a community whose loyalties extend beyond national borders. The article discusses early penitential practices for soldiers and argues that the Eucharist challenges the sacrificial nationalism that frequently sustains warfare.

Foundations and Principles

Pope Francis on Forgiveness and Peace

| Pope Francis | Vatican | 2015-12-08] Indifference to suffering contributes to violence and war. The message presents mercy, solidarity, and forgiveness as political and spiritual practices capable of interrupting cycles of retaliation.

Historical Development

=====Early Christian Pacifism Before Constantine===== * [https://www.bbc.co.uk/religion/religions/christianity/history/ BBC Religion | “Christianity and War” | BBC | 2014-09-23] During Christianity’s first centuries, many believers refused military service or participation in violence. This earlier tradition later competed with emerging just war arguments after Christianity became closely associated with imperial government.

Miscellaneous

In Defence of War

| John P. Burgess | The Christian Century | 2014-03-30] The article reviews Nigel Biggar’s argument that military force can sometimes defend justice, restrain aggression, and preserve political peace. It also addresses Christian objections that warfare corrupts moral judgment and is rarely conducted within the strict limits required by just-war doctrine.

Just How Realistic Is Just-War Theory?

| Stanley Hauerwas | ABC Religion & Ethics | 2013-09-01] Just-war advocates often present their position as a realistic alternative to pacifism, but the theory may depend upon churches and political institutions capable of disciplining national power. The article questions whether those conditions actually exist in modern states.

Foundations and Principles

Was the American Revolution a Just War?

| Thomas Kidd | Berkley Center for Religion, Peace, and World Affairs | 2013-07-04] The article evaluates the American Revolution through Christian principles of political order, legitimate resistance, and defensive force. It asks whether colonial grievances were serious enough to justify rebellion and the violence that followed.

Historical Development

The Conversion of Constantine and Christian Warfare

| World History Encyclopedia | 2013-04-19] Constantine’s patronage of Christianity transformed the church’s relationship with imperial authority and military power. Christians increasingly had to determine how discipleship could be reconciled with governing and defending an empire.

Miscellaneous

Christianity and the End of War

| Stanley Hauerwas | ABC Religion & Ethics | 2011-09-08] Christians should imagine social and political practices capable of reducing humanity’s dependence on war. The article invites just-war advocates and pacifists to collaborate in confronting the institutions and assumptions that make organized violence appear inevitable.

Could C. S. Lewis Have Imagined a World Without War?

| Stanley Hauerwas | ABC Religion & Ethics | 2011-07-18] C. S. Lewis associated military courage with chivalry, honor, and the disciplined use of force. The article examines whether this admiration for martial virtues prevented Lewis from fully imagining Christian moral life beyond the permanent possibility of war.

C. S. Lewis and the Christian Warrior

| Stanley Hauerwas | ABC Religion & Ethics | 2011-07-17] Lewis admired the ideal of a warrior who combined courage against injustice with mercy toward the enemy. The article questions whether this chivalric vision sufficiently challenges the institutions and loyalties that perpetuate war.

Foundations and Principles

The Ecumenical Call to Just Peace

| World Council of Churches | WCC | 2011-02-17] The statement describes peace as a pattern of right relationships within communities, among nations, with the economy, and with creation. It urges churches to move beyond exclusive reliance on just-war reasoning.

Miscellaneous

A Christian Warrior’s Code?

D. Capetz | Christian Ethics Today | 2010-12-27] Christian military personnel must navigate rules of engagement, international law, conscience, and duties toward civilians and prisoners. The article considers whether a distinct Christian code can help soldiers resist cruelty, revenge, and unlawful commands.

A War of Words About War

Charles Kimball | Christian Ethics Today | 2010-12-27] Christian debates sometimes treat just-war criteria as the central teaching of Jesus rather than as a later attempt to regulate tragic political choices. The article challenges believers to place peacemaking, enemy love, and resistance to violence at the center of their moral reflection.

Foundations and Principles

The Christian Tradition on War and Peace

| Glen H. Stassen | Christian Ethics Today | 2010-12-27] The Christian tradition contains several approaches to war, including pacifism, just-war doctrine, crusading ideologies, and active peacemaking. The article traces the classical origins of just-war thought and evaluates its development within Christian theology.

Miscellaneous

Early Christian Opposition to War

| David W. T. Brattston | Christian Ethics Today | 2010-12-27] Early Christian writers frequently opposed killing and participation in warfare, even though some Christians served in the Roman military. The article examines evidence used by scholars who argue that pacifism was the dominant ethical position of the pre-Constantinian church.

The Sacrifice of Christ and the Sacrifices of War

| Stanley Hauerwas | ABC Religion & Ethics | 2010-11-13] War creates powerful rituals of sacrifice, remembrance, and national unity that may compete with Christian understandings of Christ’s sacrifice. The article argues that Christian worship and ecclesial community should form believers more deeply than the narratives of military nationalism.

Civil Religion and Military Sacrifice

| Stanley Hauerwas | ABC Religion & Ethics | 2010-11-13] National rituals often portray soldiers’ deaths as redemptive sacrifices that preserve the political community. The article argues that Christians must distinguish the sacrifice of Christ from narratives that sanctify warfare and national power.

The Church as an Alternative to War

| Stanley Hauerwas | ABC Religion & Ethics | 2010-10-27] War functions as a powerful moral institution that gives people identity, purpose, and a sense of sacrifice. Hauerwas argues that the church should embody a community whose practices make allegiance to warfare less compelling.

The Limits of Christian Realism

| Stanley Hauerwas | ABC Religion & Ethics | 2010-10-26] Just-war theory is often described as more realistic than Christian pacifism. The article argues that just war itself requires disciplined communities and political conditions that may rarely exist in modern nation-states.

Foundations and Principles

When the Shooting Stops: Criteria for a Just Peace

Louis V. Iasiello | The Christian Century | 2010-09-21] Christian moral responsibility continues after military victory or a ceasefire. Just-peace principles require reconstruction, reconciliation, restoration of political order, accountability for wrongdoing, and avoidance of punitive arrangements that prepare the ground for another war.

Miscellaneous

Who Would Jesus Kill?

| Tobias Winright | The Christian Century | 2010-04-06] A review of Christian approaches to war considers pacifism, just-war theory, military conduct, and obligations after conflict. Particular attention is given to ‘’jus post bellum’’ and the creation of a just political order following war.

Modern Applications

Nuclear Weapons and Moral Questions: The Path to Zero

| Edwin F. O’Brien | United States Conference of Catholic Bishops | 2009-07-29] Catholic teaching has provisionally tolerated nuclear deterrence only when it contributes to disarmament and prevents nuclear attack. The document argues that proliferation, terrorism, accidental launches, and the catastrophic effects of nuclear weapons make continued reliance on deterrence morally dangerous.

Foundations and Principles

Benedict XVI on Fighting Poverty and Building Peace

| Pope Benedict XVI | Vatican | 2008-12-08] Economic deprivation, inequality, and exclusion contribute to conflict and instability. Christian peacemaking therefore requires addressing structural causes of violence rather than focusing only on decisions made after war begins.

Miscellaneous

Blessed Are the Pacifists

| Michael G. Cartwright | The Christian Century | 2008-02-26] The review compares Christian pacifism, just-war reasoning, and the emerging practice of just peacemaking. It shows how pacifists have sometimes used just-war standards to expose the moral failures of particular military campaigns.

Foundations and Principles

Benedict XVI on Peace and Human Rights

| Pope Benedict XVI | Vatican | 2006-12-08] Respect for the human person is presented as the foundation of peace. The message connects disarmament, religious freedom, humanitarian law, development, and protection of civilians.

Miscellaneous

There Is No Just-War Exception for Torture

| George Hunsinger | The Christian Century | 2006-09-19] Torture violates human dignity and cannot be reconciled with Christian restrictions on the treatment of enemies and prisoners. The article challenges attempts to justify cruel interrogation through emergency scenarios or appeals to national security.

Foundations and Principles

In War and in Peace

Daniel M. Bell Jr. | The Christian Century | 2005-09-06] Just-war thought is more than a checklist used by governments to approve military action. The article presents it as a Christian practice shaped by communities committed to justice, discipline, neighbor love, and truthful political judgment.

Just War as a Discipline of Political Humility

| Jean Bethke Elshtain | Carnegie Council for Ethics in International Affairs | 2003-11-06] Just-war reasoning attempts to hold together resistance to grave evil and recognition of human fallibility. It requires leaders to justify force publicly while accepting limits on motives, methods, objectives, and treatment of enemies.

Miscellaneous

The Just-War Tradition and American Power

Commonweal | 2003-01-24] The proposed invasion of Iraq is evaluated against just cause, last resort, proportionality, probability of success, and legitimate authority. The article demonstrates how strict application of Christian criteria can challenge official arguments for war.

John Paul II’s Opposition to the Iraq War

| Pope John Paul II | Vatican | 2003-01-13] Pope John Paul II insisted that war is not an ordinary instrument for resolving disputes and must be treated as a last resort. His address warned against unilateral military action and emphasized international law and diplomacy.

An Ethical Analysis of War Against Iraq

| Gerard F. Powers | United States Conference of Catholic Bishops | 2002-12] Preventive war against Iraq risked weakening the traditional presumption against initiating military force. The analysis examines evidence of threat, legitimate authority, peaceful alternatives, proportionality, and the dangerous precedents that could follow from expanding just-war doctrine.

Just-War Divide: One Tradition, Two Views

James Turner Johnson | The Christian Century | 2002-08-14] Christians invoking the same just-war tradition often reach opposite conclusions about particular conflicts. The article distinguishes stricter and more permissive interpretations and asks whether the tradition has become a tool for confirming preexisting partisan judgments.

Modern Applications

The War on Terror and Just-War Reasoning

| Jean Bethke Elshtain | Carnegie Council for Ethics in International Affairs | 2002-04-09] The response to terrorism raised questions about self-defense, nonstate enemies, preventive action, and civilian risk. The discussion examines whether traditional Christian standards can govern conflicts that lack conventional battlefields.

Miscellaneous

The Just-War Tradition and Contemporary Conflict

Darrell Cole | Baylor University | 2002] Christian just-war reasoning seeks to define faithful military service in a fallen world. The essay emphasizes protection of neighbors, legitimate political authority, martial virtue, and the distinction between force and cruelty.

Christian Ethics After September 11

R. Heimbach | Baylor University | 2002] Christian thinkers disagreed about whether military action following terrorist attacks met the requirements of just cause, legitimate authority, and proportionality. The essay represents a conservative evangelical defense of applying just-war doctrine to terrorism.

The Christian Just-War Tradition as Restraint

| George Weigel | First Things | 2001-10] Just-war theory is presented as a framework for responsible political action rather than a presumption that every use of force is immoral. The article applies classical principles to terrorism while emphasizing moral limits on military response.

Soldiering: Can Christians Serve in the Armed Forces?

Yoder | The Christian Century | 2001-07-04] The morality of military service involves more than determining whether a particular war satisfies abstract criteria. The article revisits early Christian concerns about allegiance, obedience, killing, and whether participation in military institutions is compatible with discipleship.

Selective Conscientious Objection and the Vietnam War

| The Christian Century | 2000-11-08] Christian opposition to the Vietnam War helped generate arguments for conscientious objection to particular unjust wars rather than opposition to every war. Just-war doctrine became a basis for challenging military service when government policy violated moral standards.

Economic Sanctions and Civilian Harm

| Joy Gordon | Ethics & International Affairs | 1999] Economic sanctions may cause severe civilian suffering while leaving political leaders relatively protected. The article asks whether sanctions should be evaluated through just-war principles such as discrimination, proportionality, and probability of success.

Foundations and Principles

=====The Catholic Church and Modern Just War Teaching===== * [https://www.vatican.va/archive/ENG0015/__P81.HTM Vatican | “Catechism of the Catholic Church: Legitimate Defense” | Vatican | 1997-08-15] The Catechism presents strict moral conditions governing the use of military force while emphasizing peace, restraint, and the protection of innocent life. Recent popes have urged increasingly narrow application of just war principles.

Miscellaneous

Sowing Weapons of War

| United States Catholic Conference | USCCB | 1995-06-16] The document opposes antipersonnel landmines because they cannot distinguish soldiers from civilians and continue causing casualties after conflict. It applies Catholic principles of discrimination and proportionality to a particular weapons system.

‘’Evangelium Vitae’’ and Legitimate Defense

| Pope John Paul II | Vatican | 1995-03-25] The defense of innocent life may sometimes require restraining an unjust aggressor, but force must remain proportionate. The encyclical places defensive action within a broader Christian commitment to the dignity of every human life.

The Arms Trade and Christian Responsibility

| Pontifical Council for Justice and Peace | Vatican | 1994-05-01] The international arms trade can intensify conflict, support repression, and divert resources from development. Christian concern about war must therefore address the economic systems that supply weapons as well as the decisions to use them.

Foundations and Principles

Lutheran Teaching on Peace and War

| Evangelical Lutheran Church in America | ELCA | 1994-04-18] Lutheran ethics recognizes government’s responsibility to restrain violence while warning against excessive reliance on coercion. The church emphasizes prevention, reconciliation, community safety, and responsible political participation.

The Harvest of Justice Is Sown in Peace

Conference of Catholic Bishops | USCCB | 1993-11-17] Ten years after ‘’The Challenge of Peace’’, the bishops assess arms control, regional wars, humanitarian intervention, economic justice, and nonviolence. They present just-war doctrine and peacemaking as complementary disciplines.

Miscellaneous

The Catechism on Avoiding War

Vatican | 1992] The Catechism states that governments and citizens must work to avoid war while acknowledging legitimate defense after peaceful alternatives have failed. It specifies demanding conditions for evaluating a decision to use military force.

The Catechism on Noncombatant Immunity

Vatican | 1992] Moral law remains binding during war, and actions directed toward the indiscriminate destruction of populations are condemned. Soldiers must refuse orders involving genocide, torture, or deliberate attacks upon civilians.

The Catechism on the Arms Race

Vatican | 1992] Accumulating weapons does not reliably establish peace and can intensify fear, inequality, and political instability. The Catechism warns that excessive military expenditure diverts resources from urgent human needs.

Foundations and Principles

The Challenge of Peace: God’s Promise and Our Response

| National Conference of Catholic Bishops | United States Conference of Catholic Bishops | 1983-05-03] This influential pastoral letter evaluates nuclear deterrence, arms control, conscientious objection, nonviolence, and the traditional conditions for justified military force. It recognizes both just-war teaching and Christian nonviolence as serious moral traditions while insisting upon a strong presumption against war.

Denominational Perspectives

The Just-War Ethic and Catholic Theology

Hehir | United States Conference of Catholic Bishops | 1982-12-08] Catholic just-war teaching developed through interaction among theology, natural law, political responsibility, and changing military technology. The essay examines continuity within the tradition while showing how nuclear weapons forced Catholic thinkers to reconsider deterrence, proportionality, and civilian immunity

Foundations and Principles

‘’Gaudium et Spes’’ on War and Peace

| Second Vatican Council | Vatican | 1965-12-07] The council condemns indiscriminate destruction while recognizing the right of legitimate defense under strict conditions. It also praises conscientious objection and urges nations to create stronger institutions for preventing war.

‘’Pacem in Terris’’ and International Peace

| Pope John XXIII | Vatican | 1963-04-11] Peace must be founded on truth, justice, charity, and freedom rather than fear or military domination. The encyclical calls for international institutions capable of addressing conflicts without resorting to war.

Miscellaneous

The Nuremberg Principles and Unlawful Orders

| International Law Commission | United Nations | 1950] The Nuremberg Principles establish that official position and superior orders do not erase individual responsibility for international crimes. Christian soldiers therefore face a duty to evaluate commands rather than obey political authority without moral judgment.

Foundations and Principles

Legitimate Authority and the United Nations

United Nations | 1945-06-26] The United Nations Charter restricts the use of force while recognizing individual and collective self-defense. Christian ethicists debate how international authorization affects the just-war requirement of legitimate authority.

Miscellaneous

The Prohibition Against Aggressive War

United Nations | 1945-06-26] The Charter prohibits the threat or use of force against another state’s territorial integrity or political independence. This legal rule corresponds with the Christian rejection of conquest, revenge, and territorial expansion as just causes.

The Right of Self-Defense

United Nations | 1945-06-26] Article 51 recognizes a state’s inherent right of self-defense following an armed attack. Just-war theory adds moral requirements such as necessity, proportionality, right intention, and protection of civilians.

The Westminster Confession on Lawful War

Orthodox Presbyterian Church | 1647] The confession teaches that civil authorities may wage war on just and necessary occasions. Its formulation became influential among Reformed Christians who accepted qualified military service rather than pacifism.

The Thirty-Nine Articles on Christian Military Service

| Church of England | Anglican Communion | 1571] The Anglican articles state that Christians may bear arms and serve in wars commanded by lawful authorities. The statement reflects the Reformation-era acceptance of just-war principles within established Protestant churches.

Historical Development

John Calvin on Civil Government and War

Christian Classics Ethereal Library | 1536] Calvin regarded civil government as divinely permitted to protect public order and punish grave wrongdoing. Magistrates could wage defensive war, but they remained accountable to justice and should not act from ambition or rage.

Martin Luther on Whether Soldiers Can Be Saved

| Martin Luther | Evangelical Lutheran Church in America | 1526] Luther argues that military service can be compatible with Christianity when soldiers act under legitimate authority and avoid personal hatred or private revenge. He also insists that blatantly unjust commands should not be obeyed.

Miscellaneous

Just-War Theory Roundtable Discussion

| Berkley Center for Religion, Peace, and World Affairs | Georgetown University | n.d.] Scholars discuss the Christian and classical foundations of just-war theory and its influence on international law. The discussion considers legitimate authority, just cause, proportionality, and protection of noncombatants.

Politics, Justice, and War

| Berkley Center for Religion, Peace, and World Affairs | Georgetown University | n.d.] Christian theologians and political thinkers examine when governments may permissibly employ deadly force. The program compares different interpretations of just-war doctrine, pacifism, political authority, and responsibility for protecting vulnerable populations.

Foundations and Principles

Just War and the Christian Realist Tradition

Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] Christian realism emphasizes the persistence of sin and the need for political institutions capable of restraining injustice. Its supporters often defend limited force while warning that nations routinely disguise self-interest as moral necessity.

Historical Development

Augustine’s Political Philosophy

Weithman | Internet Encyclopedia of Philosophy | n.d.] Augustine’s account of fallen human nature explains why governments use coercive power to restrain wrongdoing. The entry examines how his theology contributed to just-war reasoning while preserving suspicion of pride, cruelty, and imperial ambition.

Aquinas on War in the ‘’Summa Theologiae’’

| n.d.] Aquinas identifies sovereign authority, just cause, and right intention as the principal conditions for a just war. His brief treatment became a foundation for later Catholic and Protestant analysis of military force.

Aquinas on Self-Defense

New Advent | n.d.] Aquinas argues that defensive action may have the unintended effect of killing an aggressor when the defender’s purpose is preserving life. This discussion became central to the doctrine of double effect and modern debates about proportional defensive force.

Foundations and Principles

=====Aquinas on Peace===== *[https://www.newadvent.org/summa/3029.htm | Thomas Aquinas | New Advent | n.d.] Peace is more than the absence of conflict and requires properly ordered relationships and desires. Aquinas’s account helps explain why just-war doctrine treats restoration of peace as the objective of force rather than victory or punishment alone.

Historical Development

Aquinas on Charity Toward Enemies

| n.d.] Christian love extends even to enemies, although it does not necessarily prohibit resistance to wrongdoing. The discussion illustrates the moral tension between opposing aggression and maintaining concern for the humanity and ultimate good of an adversary.

Modern Applications

The Christian Origins of International Humanitarian Law

International Committee of the Red Cross | ICRC | n.d.] Christian teachings about mercy, human dignity, and restraint have contributed to humanitarian efforts to limit suffering in war. The resource explores relationships between religious ethics and contemporary humanitarian principles.

Religion and Humanitarian Principles

International Committee of the Red Cross | ICRC | n.d.] Religious traditions can reinforce rules protecting wounded soldiers, prisoners, civilians, and humanitarian workers. The project examines how theological commitments may encourage compliance with humanitarian law during armed conflict.

Miscellaneous

The Geneva Conventions and Christian Moral Restraint

| International Committee of the Red Cross | ICRC | n.d.] The Geneva Conventions codify protections for wounded combatants, prisoners of war, and civilians. These legal requirements overlap with Christian just-war principles of discrimination, humane treatment, and limits on military necessity.

The Principle of Distinction

Committee of the Red Cross | ICRC | n.d.] Parties to a conflict must distinguish civilians from combatants and civilian objects from military targets. This rule closely parallels the just-war prohibition against intentionally attacking innocent people.

Foundations and Principles

The Principle of Proportionality

Committee of the Red Cross | ICRC | n.d.] An attack is prohibited when foreseeable civilian harm would be excessive compared with the concrete military advantage anticipated. Christian ethicists use similar reasoning while debating how proportionality can be applied amid uncertainty.

Miscellaneous

Precautions in Attack

International Committee of the Red Cross | ICRC | n.d.] Military forces must take feasible precautions to verify targets and reduce civilian casualties. The requirement gives practical form to just-war commitments to discrimination, restraint, and respect for innocent life.

The Protection of Prisoners of War

Committee of the Red Cross | ICRC | n.d.] Captured combatants remain human beings entitled to protection from torture, humiliation, and retaliation. Christian teaching about enemy love reinforces the legal principle that prisoners cannot be treated merely as instruments of war.

Foundations and Principles

The Protection of Civilians in Armed Conflict

International Committee of the Red Cross | ICRC | n.d.] Civilians bear a disproportionate share of suffering in modern warfare. The resource explains legal protections that correspond with the Christian just-war obligation to preserve noncombatant immunity.

Miscellaneous

Explosive Weapons in Populated Areas

International Committee of the Red Cross | ICRC | n.d.] Heavy explosive weapons used in cities create extensive civilian casualties and destroy essential infrastructure. Their effects raise serious questions about discrimination and proportionality under both humanitarian law and Christian ethics.

Modern Applications

Cyber Operations During Armed Conflict

| International Committee of the Red Cross | ICRC | n.d.] Cyberattacks can disrupt hospitals, electrical systems, water supplies, and other civilian infrastructure. Just-war principles remain relevant even when violence is conducted through digital rather than conventional weapons.

Chemical Weapons and the Ethics of War

| International Committee of the Red Cross | ICRC | n.d.] Chemical weapons cause uncontrollable suffering and have been broadly prohibited by international law. Christian moral reasoning condemns weapons whose effects cannot be limited to legitimate military targets.

Biological Weapons and Indiscriminate Harm

| International Committee of the Red Cross | ICRC | n.d.] Biological weapons threaten soldiers and civilians alike and may spread far beyond an intended battlefield. Their uncontrollable effects conflict with the just-war requirements of discrimination and proportionality.

Landmines and Postwar Civilian Suffering

International Committee of the Red Cross | ICRC | n.d.] Antipersonnel mines continue killing and injuring civilians long after wars end. Their persistent effects challenge claims that military violence can remain limited to active combatants and immediate military objectives.

Foundations and Principles

Cluster Munitions and Proportionality

International Committee of the Red Cross | ICRC | n.d.] Cluster munitions scatter explosives across wide areas and frequently leave unexploded remnants. Christian just-war principles raise strong objections to weapons that predictably endanger civilians during and after hostilities.

Modern Applications

Nuclear Weapons and International Humanitarian Law

International Committee of the Red Cross | ICRC | n.d.] Nuclear weapons produce catastrophic blast, heat, radiation, and long-term environmental damage. Their effects make compliance with distinction, proportionality, and humane treatment extraordinarily difficult.

Miscellaneous

The Responsibility to Protect

| United Nations | United Nations | n.d.] The responsibility-to-protect framework holds that states must protect populations from genocide, war crimes, ethnic cleansing, and crimes against humanity. Christian just-war thinkers debate when this responsibility permits or requires outside intervention.

Foundations and Principles

Just War and Humanitarian Intervention

Carnegie Council for Ethics in International Affairs | Carnegie Council | n.d.] Just-war theory provides standards for evaluating intervention, self-defense, and military conduct. The resource explains the distinction between justice in going to war, justice during war, and justice after war.

Miscellaneous

Preventive War and Preemptive War

| Carnegie Council for Ethics in International Affairs | Carnegie Council | n.d.] Preemptive action responds to an imminent attack, while preventive war targets a possible future threat. Christian just-war doctrine is generally more skeptical of preventive war because predictions about distant threats are uncertain and open to manipulation.

Christian Ethics and the Use of Force

| Markkula Center for Applied Ethics | Santa Clara University | n.d.] The resource introduces the traditional standards governing decisions to begin and conduct warfare. It also demonstrates why satisfaction of one criterion cannot compensate for failure to meet the others.

Historical Development

Luther’s Doctrine of the Two Kingdoms and War

Philosophy | n.d.] Luther distinguished the church’s spiritual mission from the government’s responsibility to restrain wrongdoing. This framework influenced Protestant defenses of military force while also creating debates about obedience to unjust rulers.

Denominational Perspectives

The Methodist Articles of Religion and War

Church | United Methodist Church | n.d.] Methodist teaching inherited the traditional Christian recognition that governments may use force while emphasizing holiness, peace, and accountability. Later Methodists developed both pacifist and just-war interpretations of this inheritance.

Foundations and Principles

The United Methodist Church on War and Peace

General Board of Church and Society | United Methodist Church | n.d.] The denomination emphasizes diplomacy, disarmament, nonviolent conflict resolution, and opposition to weapons that inflict indiscriminate suffering. Its social teaching places the prevention of war alongside evaluation of military conduct.

Denominational Perspectives

The Episcopal Church and Just-War Criteria

Relations | Episcopal Church | n.d.] Episcopal reflection applies just-war standards to decisions about military intervention and national policy. It stresses legitimate authority, last resort, proportionality, right intention, and civilian immunity.

Foundations and Principles

The Presbyterian Church and Peacemaking

Presbyterian Peacemaking Program | Presbyterian Church (USA) | n.d.] Presbyterian peacemaking addresses war prevention, reconciliation, nonviolence, international cooperation, and structural injustice. The program reflects a movement from evaluating wars toward cultivating the conditions of a just peace.

The Southern Baptist Convention and Just War

Ethics and Religious Liberty Commission | Southern Baptist Convention | n.d.] The article explains how evangelical Christians use biblical teaching and natural-law principles to evaluate military force. It outlines just cause, legitimate authority, right intention, proportionality, last resort, and civilian protection.

Modern Applications

The National Association of Evangelicals on Nuclear Weapons

Evangelicals | NAE | n.d.] Evangelical leaders consider nuclear weapons through commitments to human dignity, national defense, peacemaking, and care for creation. The resource encourages arms reduction while acknowledging debates surrounding deterrence.

Denominational Perspectives

Mennonite Christian Pacifism

World | Anabaptist World | n.d.] Mennonite theology holds that Jesus’ life and teaching prohibit Christians from killing enemies. This perspective challenges just-war doctrine by arguing that faithful discipleship requires nonviolent resistance rather than participation in state warfare.

Foundations and Principles

The Historic Peace Churches

Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] Mennonites, Quakers, and the Church of the Brethren developed enduring traditions of conscientious objection and nonviolence. Their witness represents a major Christian alternative to just-war theology.

Denominational Perspectives

=====Quaker Opposition to War===== *[https://quaker.org/peace/ | Religious Society of Friends | Quaker.org | n.d.] Quakers affirm that the divine worth of every person is incompatible with organized killing. Their peace testimony has inspired conscientious objection, mediation, humanitarian relief, and nonviolent social movements.

Foundations and Principles

The Church of the Brethren Peace Witness

the Brethren | n.d.] The Church of the Brethren teaches that all war is contrary to the spirit and example of Jesus. Its members have promoted conscientious objection, reconciliation, disaster relief, and alternatives to military service.

=====Christian Peacemaker Teams===== *[https://cpt.org/about | Community Peacemaker Teams | CPT | n.d.] Christian peacemakers accompany communities threatened by political violence and use nonviolent methods to reduce harm. Their work demonstrates a practical alternative to the assumption that armed intervention is the only way to protect vulnerable people.

The World Council of Churches and Just Peace

| World Council of Churches | WCC | n.d.] The World Council of Churches promotes reconciliation, disarmament, conflict prevention, and nonviolent transformation. Its just-peace framework shifts attention from determining when war is permissible to building political relationships that make war less likely.

Historical Development

Saint Basil on Killing in War

New Advent | n.d.] Basil recommended a period of exclusion from Communion for Christians who killed during war, even when their actions were not treated as murder. His position illustrates the Eastern Christian view that necessary warfare may still require repentance.

Origen and Early Christian Opposition to Warfare

n.d.] Origen argued that Christians serve rulers through prayer and moral faithfulness rather than participation in killing. His writings provide important evidence for the strength of pacifist thought in the early church.

Tertullian on Idolatry and Military Service

n.d.] Tertullian questioned whether Christians could participate in military institutions associated with killing, pagan rituals, and unconditional obedience. His objections reveal that early Christian resistance to warfare involved both nonviolence and religious allegiance.

Lactantius on the Prohibition Against Killing

n.d.] Lactantius taught that a just person should not kill or accuse another person of a capital crime. His strict interpretation of Christian nonviolence stands in contrast to the later development of just-war doctrine.

Miscellaneous

The Council of Arles and Christian Soldiers

Catholic Encyclopedia | n.d.] The Council of Arles addressed Christians who abandoned military service during peacetime. Its decision indicates the growing acceptance of Christian participation in imperial institutions after Constantine.

Foundations and Principles

The Peace of God Movement

Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] Medieval church leaders attempted to protect clergy, peasants, pilgrims, and church property from feudal violence. The movement illustrates how Christian institutions sought to restrain warfare even when they could not abolish it.

Miscellaneous

The Truce of God

Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] The Truce of God restricted fighting during particular days and religious seasons. It represents an early institutional effort to limit the frequency and social effects of warfare through Christian authority.

Foundations and Principles

The Crusades and the Transformation of Just War

Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] Crusading ideology combined pilgrimage, penitence, papal authority, and warfare. Historians debate whether crusades extended just-war reasoning or transformed limited war into a form of sacred and spiritually meritorious violence.

Miscellaneous

The Spanish Scholastics and Colonial War

Philosophy | Internet Encyclopedia of Philosophy | n.d.] Spanish scholastics debated conquest, indigenous sovereignty, natural rights, conversion, and legitimate political authority. Their arguments both challenged and sometimes facilitated European colonial expansion.

Bartolomé de las Casas and the Rejection of Conquest

Editors of Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] Las Casas condemned violence, enslavement, and forced conversion in the Americas. His defense of indigenous peoples challenged claims that religious difference or alleged cultural inferiority supplied a just cause for war.

Historical Development

The Valladolid Debate

Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] The Valladolid debate considered whether Spanish conquest of indigenous societies could be morally justified. Christian ideas about natural law, evangelization, human equality, and just war were central to both sides.

The School of Salamanca and International Justice

Encyclopaedia Britannica | Encyclopaedia Britannica | n.d.] Salamanca theologians developed influential arguments about sovereignty, commerce, human rights, and war. Their work helped establish moral limits on conquest and contributed to the emergence of international law.

Miscellaneous

Justice After War

| Carnegie Council for Ethics in International Affairs | Carnegie Council | n.d.] ‘’Jus post bellum’’ examines responsibilities for ending war, rebuilding institutions, compensating victims, prosecuting crimes, and establishing reconciliation. A war cannot be considered fully just if victory produces exploitation, chaos, or renewed oppression.

Truth and Reconciliation After Conflict

for Transitional Justice | ICTJ | n.d.] Transitional justice uses truth commissions, prosecutions, reparations, institutional reform, and memorialization to address mass violence. These practices correspond with Christian concerns for repentance, forgiveness, accountability, and restoration.

War-Crimes Accountability

Criminal Court | ICC | n.d.] The International Criminal Court prosecutes genocide, crimes against humanity, war crimes, and aggression when legal conditions are met. Accountability reinforces the just-war principle that political leaders and soldiers remain morally responsible during conflict.

Command Responsibility

| International Committee of the Red Cross | ICRC | n.d.] Military commanders may be responsible for crimes they order, permit, or fail to prevent. Christian ethics likewise rejects the idea that obedience or official position automatically excuses participation in immoral conduct.

Moral Injury Among Soldiers

| National Center for PTSD | U.S. Department of Veterans Affairs | n.d.] Moral injury may occur when soldiers perpetrate, witness, or fail to prevent acts that violate deeply held convictions. The concept illuminates the spiritual and psychological cost of warfare even when governments describe a conflict as justified.

Military Chaplains and Moral Formation

| Berkley Center for Religion, Peace, and World Affairs | Georgetown University | n.d.] Chaplains may help soldiers reflect upon conscience, lawful orders, treatment of enemies, and the moral limits of military action. Their role becomes controversial when pastoral care is confused with religious endorsement of state policy.

Conscientious Objection Under International Law

| Office of the United Nations High Commissioner for Human Rights | United Nations | n.d.] Conscientious objection protects individuals who cannot participate in military service because of religious or moral convictions. Christian traditions disagree over whether objection should apply to all wars or only to conflicts judged unjust.

Denominational Perspectives

Catholic Teaching on Conscientious Objection

| United States Conference of Catholic Bishops | USCCB | n.d.] Catholic teaching respects those who refuse all military service while also recognizing service undertaken within moral limits. The resource addresses conscience, selective objection, alternative service, and the duty to reject unlawful commands.

Miscellaneous

Private Military Companies and Moral Accountability

Committee of the Red Cross | ICRC | n.d.] Private military and security companies complicate responsibility, legal oversight, and legitimate authority. Just-war theory asks whether governments may delegate coercive power without weakening public accountability for violence.

Mercenaries and the Legitimate Use of Force

Nations Working Group on Mercenaries | United Nations | n.d.] Mercenary activity raises concerns about private profit, divided loyalties, and weak accountability. Christian just-war doctrine traditionally reserves war-making authority to public institutions responsible for the common good.

Child Soldiers and the Ethics of Warfare

| Office of the Special Representative for Children and Armed Conflict | United Nations | n.d.] Recruiting children for armed conflict exploits their vulnerability and causes lasting physical and psychological harm. Christian commitments to protect the innocent strongly condemn their use as combatants.

Sexual Violence in Armed Conflict

Representative on Sexual Violence in Conflict | United Nations | n.d.] Wartime sexual violence attacks individuals, families, and entire communities and is sometimes used deliberately as a military strategy. Just-war ethics requires accountability and protection extending beyond conventional battlefield conduct.

Forced Displacement and War

| United Nations High Commissioner for Refugees | UNHCR | n.d.] War forces civilians from their homes and exposes them to hunger, exploitation, and statelessness. Judgments about proportionality must consider displacement and long-term social destruction rather than counting only immediate battlefield deaths.

Starvation as a Method of Warfare

International Committee of the Red Cross | ICRC | n.d.] International humanitarian law prohibits deliberately starving civilians as a method of warfare. Christian teaching likewise rejects attacks upon food, water, and survival systems intended to punish entire populations.

The Protection of Medical Personnel

International Committee of the Red Cross | ICRC | n.d.] Hospitals, ambulances, patients, and medical workers receive special protection during armed conflict. Attacking them violates humanitarian law and the Christian duty to care for wounded people regardless of allegiance.

Foundations and Principles

Climate Change, Conflict, and Christian Peacemaking

Churches | WCC | n.d.] Climate disruption can intensify displacement, scarcity, and political instability. Christian peacemaking requires addressing ecological pressures that contribute to conflict rather than treating war as disconnected from environmental injustice.

Miscellaneous

Blockades and the Ethics of Siege

| International Committee of the Red Cross | ICRC | n.d.] Sieges and blockades may trap civilians without food, water, medicine, or safe passage. Just-war ethics requires that military necessity never become a blanket justification for collective punishment.

Religion, Nationalism, and the Sacralization of War

| Berkley Center for Religion, Peace, and World Affairs | Georgetown University | n.d.] Religious nationalism can portray the state, territory, or ethnic community as sacred and its enemies as threats to divine order. Such narratives undermine the restraint, humility, and universal moral concern required by Christian just-war thought.

Christian Zionism and the Ethics of War

Robert O. Smith | The Christian Century | n.d.] Christian interpretations of biblical prophecy can influence political attitudes toward territory, military force, and Palestinian rights. The article raises questions about whether theological certainty weakens concern for proportionality and civilian suffering.

The National Council of Churches on War

National Council of Churches | NCC | n.d.] Ecumenical Protestant bodies promote diplomacy, disarmament, human rights, and nonviolent approaches to conflict. Their advocacy reflects longstanding Christian concern that governments often resort to force before peaceful alternatives are exhausted.

Modern Applications

Catholic Debate Over Humanitarian Intervention

Christiansen | Commonweal | n.d.] Humanitarian intervention may protect populations facing mass atrocities, but military action can also intensify suffering or conceal strategic interests. Christian ethics requires careful attention to authority, motives, feasibility, and postwar obligations.

Foundations and Principles

Just Peacemaking as an Alternative Framework

Peacemaking Initiative | n.d.] Just peacemaking identifies practical methods for preventing violence, including nonviolent direct action, cooperative conflict resolution, human-rights advocacy, economic development, and international institutions. It supplements debates about permissible war with strategies for avoiding war.

The Practices of Just Peacemaking

Fuller Studio | n.d.] Christian peacemaking should be evaluated through identifiable practices that have reduced conflict in real historical situations. The approach challenges both pacifists and just-war advocates to support concrete measures that prevent violence.

Restorative Justice and Christian Peacebuilding

Peacebuilding | Eastern Mennonite University | n.d.] Restorative justice seeks to repair harm through accountability, participation, restitution, and transformed relationships. Its principles can guide postwar reconciliation and provide alternatives to punitive cycles of retaliation.

Miscellaneous

Nonviolent Civilian Defense

International Center on Nonviolent Conflict | ICNC | n.d.] Civilian-based defense uses organized noncooperation to resist invasion, occupation, or authoritarian rule. Christian pacifists cite such strategies as evidence that protecting communities does not always require lethal force.

Unarmed Civilian Protection

Nonviolent Peaceforce | n.d.] Trained unarmed teams accompany threatened communities, monitor ceasefires, and deter violence through protective presence. Their work provides a practical test of Christian claims that vulnerable people can sometimes be defended without weapons.

Negotiation and Mediation Before War

Department of Political and Peacebuilding Affairs | United Nations | n.d.] Mediation provides structured opportunities for adversaries to resolve disputes before violence escalates. Serious pursuit of negotiation is central to the just-war requirement that force be used only as a last resort.

Preventive Diplomacy and Christian Responsibility

Department of Political and Peacebuilding Affairs | United Nations | n.d.] Preventive diplomacy seeks to identify emerging conflicts and address them before armed confrontation begins. Christian ethics increasingly treats investment in prevention as a moral obligation rather than an optional prelude to war.

Foundations and Principles

Ceasefires and the Pursuit of Just Peace

| United Nations Peacemaker | United Nations | n.d.] Ceasefires can reduce civilian suffering and create space for political negotiation, humanitarian relief, and prisoner exchanges. Christian just-peace reasoning asks whether temporary pauses can be developed into arrangements addressing the underlying injustice.

Miscellaneous

Reconciliation Without Impunity

of Peace | USIP | n.d.] Durable reconciliation must combine truth, justice, institutional reform, and renewed relationships. Christian forgiveness does not require ignoring crimes or denying victims meaningful accountability.

Foundations and Principles

Peacebuilding After Civil War

of Peace | USIP | n.d.] Postwar societies require security, legitimate institutions, economic recovery, reconciliation, and public trust. These responsibilities form part of ‘’jus post bellum’’ and determine whether military intervention actually produces a just peace.

Women, Peace, and Security

United Nations | n.d.] Women experience war in distinctive ways and often play essential roles in mediation, humanitarian relief, and reconstruction. Inclusive peace processes are generally more responsive to civilian needs and long-term community stability.

Christian Women and Peacebuilding

World Council of Churches | WCC | n.d.] Christian peacebuilding must address gender inequality and include women in decisions about security, justice, and reconciliation. The resource connects peace with equal participation within churches and political communities.

Miscellaneous

Religious Leaders and Conflict Mediation

United States Institute of Peace | USIP | n.d.] Religious leaders can reduce violence by challenging dehumanization, creating communication channels, and supporting reconciliation. They can also worsen conflict when they sacralize nationalism or portray military enemies as enemies of God.

Interreligious Dialogue and War Prevention

Dialogue Centre | KAICIID | n.d.] Interreligious dialogue can prevent political disputes from becoming conflicts framed around absolute religious identities. The work demonstrates how faith communities can address fear, misinformation, and communal hostility before violence begins.

Enemy Love as a Political Practice

| Gospel of Matthew | Bible Gateway | n.d.] Jesus commands his followers to love enemies, pray for persecutors, and reject retaliation. Christian just-war advocates interpret these teachings as governing personal motives even during justified defense, while pacifists see them as prohibiting warfare itself.

The Sermon on the Mount and Christian Nonviolence

| Gospel of Matthew | Bible Gateway | n.d.] The Sermon on the Mount emphasizes mercy, reconciliation, truthfulness, enemy love, and peacemaking. It remains the central biblical foundation for Christian critiques of violence and challenges every effort to make war morally routine.

Romans 13 and the Sword of Government

| Paul the Apostle | Bible Gateway | n.d.] Paul describes governing authority as bearing the sword against wrongdoing. Just-war theologians cite the passage to support legitimate public coercion, while pacifists dispute whether it authorizes Christians themselves to kill.

The Centurion and Christian Military Service

| Gospel of Luke | Bible Gateway | n.d.] Jesus praises a Roman centurion’s faith without explicitly demanding that he abandon military service. Supporters of Christian participation in the armed forces regard the episode as evidence that soldiering is not inherently forbidden.

Peter and the Sword

| Gospel of Matthew | Bible Gateway | n.d.] Jesus orders Peter to put away his sword during the arrest in Gethsemane. Pacifists interpret this as a decisive rejection of violent defense, while other Christians distinguish Jesus’ redemptive mission from governmental protection of the innocent.

The Cleansing of the Temple and Coercive Action

| Gospel of John | Bible Gateway | n.d.] Jesus’ expulsion of merchants from the Temple is sometimes invoked in arguments about righteous force. Interpreters disagree over whether the episode involved violence against people or symbolic prophetic disruption.

The Good Samaritan and the Duty to Protect

| Gospel of Luke | Bible Gateway | n.d.] The parable commands active care for a vulnerable stranger across communal boundaries. Just-war advocates use neighbor love to support protection from aggression, while pacifists emphasize rescue and mercy without lethal retaliation.

Foundations and Principles

Blessed Are the Peacemakers

| Gospel of Matthew | Bible Gateway | n.d.] Jesus identifies peacemakers as children of God. The teaching places conflict prevention and reconciliation at the center of Christian discipleship, regardless of whether a tradition accepts limited warfare.

Miscellaneous

Turning Swords Into Plowshares

| Book of Isaiah | Bible Gateway | n.d.] Isaiah envisions nations abandoning warfare and transforming weapons into tools of cultivation. The prophecy gives Christian peace theology an ultimate horizon beyond the regulation of armed conflict.

Foundations and Principles

The Peaceable Kingdom

| Book of Isaiah | Bible Gateway | n.d.] Isaiah describes a restored creation in which predation and harm disappear. Christian pacifists regard this vision as a model for the church, while just-war thinkers treat it as the final peace toward which limited political action should aim.

Miscellaneous

Justice, Mercy, and Humility

| Book of Micah | Bible Gateway | n.d.] Micah connects justice with mercy and humble obedience to God. The passage warns nations and soldiers that even actions taken against wrongdoing must avoid pride, cruelty, and self-righteousness.

Overcoming Evil With Good

| Paul the Apostle | Bible Gateway | n.d.] Paul instructs Christians not to repay evil for evil and to overcome evil with good. The passage is foundational for Christian nonviolence and remains a demanding restraint upon the motives of those who accept defensive force.

Foundations and Principles

The New Testament Vision of Peace

| Paul the Apostle | Bible Gateway | n.d.] Christ breaks down hostility and creates a reconciled community across former divisions. Christian political ethics must therefore resist racial, national, and religious narratives that depend upon permanent enemies.

Miscellaneous

Revelation and the Conquest of the Lamb

| Book of Revelation | Bible Gateway | n.d.] Revelation portrays Christ’s victory through sacrificial faithfulness rather than conventional military conquest. Pacifist theologians argue that this imagery redefines power, victory, and faithful resistance for the Christian community.

Foundations and Principles

Christian Hope Beyond Just War

| Book of Revelation | Bible Gateway | n.d.] The biblical story ends with the renewal of creation and the removal of death, mourning, and pain. Just-war doctrine can therefore never make warfare a permanent good but only, at most, a tragic and temporary response to injustice.