Eugenics and Colonialism
Eugenics and Colonialism
Eugenics was not simply a scientific or political movement confined to Europe and the United States. It developed within a global order shaped by empire, racial hierarchy, settler colonialism, and confidence in the biological classification of human populations. Eugenic theories supplied colonial governments, physicians, anthropologists, educators, and reformers with supposedly scientific explanations for inequality and tools for regulating reproduction, citizenship, health, sexuality, and social belonging.
Although eugenics took different forms in different societies, it repeatedly divided people into categories of fitness and unfitness. These classifications were influenced by race, ethnicity, disability, class, caste, gender, sexuality, and colonial status. Eugenic ideas helped legitimize segregation, involuntary sterilization, immigration restrictions, institutionalization, child removal, discriminatory education, and population-control programs. The effects of these policies remain visible in contemporary debates over reproductive justice, genetic research, digital health, and medical discrimination.
Eugenics, Empire, and Scientific Racism
Eugenics emerged from nineteenth-century ideas about heredity, evolution, racial difference, and national improvement. Francis Galton and other early advocates believed that selective reproduction could improve the biological quality of populations. Their theories developed in societies already organized around imperial expansion and assumptions of European racial superiority.
Colonialism provided both an intellectual framework and a testing ground for eugenic thinking. Colonized peoples were frequently represented as primitive, backward, diseased, unintelligent, or incapable of self-government. Anthropology, medicine, psychology, demography, and genetics were used to measure and classify populations, often reinforcing political hierarchies that colonial authorities had already established.
Eugenics was therefore more than a narrow program of selective breeding. It formed part of a wider system of racial knowledge that connected heredity to public health, sexuality, maternal welfare, education, immigration, nationalism, and colonial administration. Claims presented as objective science often transformed political inequality into an apparently natural biological order.
The history of British eugenics demonstrates the importance of empire to the movement. British eugenicists debated class and national decline, but they also accepted imperial hierarchies and worried about the preservation of white authority. Similar ideas circulated internationally through universities, medical institutions, scientific conferences, colonial administrations, and reform organizations.
Africa and Colonial Development
In Africa, eugenics intersected with physical anthropology, Social Darwinism, missionary activity, public health, education, and colonial development. European authorities frequently portrayed African societies as occupying an earlier stage of human development. These assumptions allowed racial inequality and foreign rule to be presented as scientifically justified or socially beneficial.
In South Africa, eugenic reasoning contributed to the intellectual environment from which segregation and apartheid developed. Scientists, physicians, psychologists, and political thinkers produced racial classifications that portrayed white supremacy as consistent with biology and modern social planning. Eugenic concerns also focused on class differences within the white population, especially fears that poverty, disability, or supposedly unsuitable motherhood would weaken the future of the white race.
South African eugenics combined race, gender, class, religion, and nationalism. Poor white women could be portrayed as reproductive threats, while Black South Africans were subjected to a broader system of racial surveillance, segregation, medical control, and political exclusion. Later controversies surrounding apartheid-era biological and chemical warfare research demonstrate how racial science could become connected to state security and allegations of reproductive targeting.
British-controlled Kenya offers another important example. Settlers and colonial officials applied eugenic ideas to African intelligence, sexuality, education, racial boundaries, and political capacity. Psychological testing was used to produce claims about African mental ability, while settler anxieties about racial mixing and demographic change influenced debates over the colony’s future.
Eugenics also shaped the idea of colonial development itself. Colonized populations were represented as deficient groups requiring scientific management, hygiene, discipline, and modernization. Development policy consequently inherited some of the racial assumptions that had previously justified direct imperial rule.
South Asia, Caste, and Population Governance
In South Asia, eugenics developed through exchanges among British colonial institutions, Indian reformers, birth-control advocates, nationalists, and caste elites. Eugenic ideas were adapted to local debates about poverty, marriage, sexuality, motherhood, caste, population, and national regeneration.
Some upper-caste reformers connected reproductive planning with the preservation or improvement of privileged social groups. Birth control could be promoted not only as a means of individual autonomy but also as a strategy for strengthening the nation or influencing which communities reproduced. These arguments demonstrate how eugenics could operate through voluntary associations and social reform rather than through compulsory state legislation alone.
Caste was sometimes defended through claims of inherited racial purity. B. R. Ambedkar rejected these biological explanations, arguing that caste restrictions could not preserve a racial purity that did not exist. His critique exposed the contradictions underlying attempts to treat caste hierarchy as a scientifically valid system of reproductive selection.
Colonial theories about race and caste also circulated beyond India. They influenced legal arguments about whiteness and citizenship in the United States and contributed to comparisons among India, South Africa, and the Caribbean. At the same time, some anticolonial thinkers appropriated evolutionary language to challenge European assertions that colonized societies were inherently inferior.
The relationship between colonial population knowledge and postcolonial reproductive policy remains especially significant. Demographic surveys, eugenic theories, family-planning campaigns, abortion policies, and population-control programs became connected in ways that complicated the boundary between colonial and postcolonial governance.
Indigenous Peoples and Settler Colonialism
Eugenics became an important instrument of settler colonialism in North America. Indigenous peoples were subjected to policies intended to regulate their identity, family structures, land relationships, and reproduction. These policies included compulsory or coerced sterilization, institutionalization, child removal, discriminatory medical treatment, and systems of identity classification such as blood quantum.
In Canada, provincial eugenics laws and later medical practices disproportionately affected First Nations, Métis, and Inuit women. Sterilization could occur without meaningful consent or under conditions involving pressure, misinformation, language barriers, and unequal relationships between patients and medical authorities.
Some historians and Indigenous advocates interpret these practices as part of a broader colonial effort to reduce Indigenous populations and weaken the survival of Indigenous communities. This interpretation places sterilization alongside residential schools, child removal, land dispossession, and other policies designed to disrupt Indigenous continuity.
The experiences of survivors such as Leilani Muir helped expose the consequences of eugenic legislation and institutional abuse. More recent allegations of coerced sterilization demonstrate that reproductive injustice cannot be treated solely as an event of the distant past. It remains connected to systemic racism, failures of informed consent, and unequal access to culturally safe health care.
Contemporary genetics also raises concerns about identity regulation, biological sampling, data ownership, and the representation of Indigenous communities. The legacy of eugenics therefore extends beyond sterilization into modern debates over genetic research and control of biological information.
Palestine and Settler-Colonial Health
Research on Palestine examines how eugenic ideas intersected with Zionist settlement, demographic policy, maternal health, child welfare, and reproductive governance. Children could be represented as national resources, while women’s reproduction became connected to the demographic expansion and political objectives of the settlement project.
Health and welfare programs were not merely humanitarian activities. They could also operate within nationalist efforts to cultivate a particular population and secure demographic strength. This history illustrates how eugenic priorities could be embedded in maternal and child health policies without always appearing as explicit programs of coercive sterilization.
The Palestinian case also demonstrates the importance of examining reproduction within settler-colonial projects. Population growth, child health, migration, territorial settlement, and national survival can become politically interconnected, turning intimate decisions about family and reproduction into matters of collective demographic strategy.
Latin America, Puerto Rico, and Colonial Population Control
Across Latin America and the Caribbean, eugenics influenced public health, immigration policy, racial ideology, maternal welfare, and national modernization. Preventive forms of eugenics emphasized hygiene, education, medical supervision, and environmental reform, but these programs could still reproduce racial and class hierarchies.
In Mexico and the United States, people of Mexican ancestry were targeted through sterilization policies shaped by prejudice involving immigration, poverty, disability, and social fitness. Mexican immigrant women sterilized at a Los Angeles public hospital during the 1960s and 1970s later challenged the procedures, revealing how medical authority, language barriers, and racial inequality could undermine informed consent.
Contemporary sterilization procedures involving Indigenous communities in Mexico show how older eugenic assumptions can persist through modern health systems. Although the language may shift from racial improvement to public health or family planning, marginalized groups may continue to experience disproportionate pressure and reduced reproductive autonomy.
Puerto Rico became an especially important site of colonial medical intervention and population control under United States authority. American physicians and administrators used public health programs and racialized representations of Puerto Ricans to strengthen colonial governance. Contraceptive trials and large-scale sterilization took place amid poverty, political inequality, industrialization, and limited reproductive choices.
The mass sterilization of Puerto Rican women, sometimes described through the term La Operación, illustrates the overlap among colonialism, economic development, birth-control advocacy, and demographic policy. These programs cannot be understood solely as expanded access to contraception because the conditions under which choices were offered were structured by unequal political and economic power.
Reproductive Control and Medical Authority
Involuntary and coerced sterilization became one of the most direct applications of eugenics. Beginning with early twentieth-century laws, governments authorized procedures against people classified as disabled, mentally ill, criminal, dependent, poor, racially undesirable, or otherwise unfit.
Medical professionals and scientific institutions played central roles in these programs. Physicians, researchers, and public-health authorities supplied technical expertise and social legitimacy, while courts and legislatures transformed discriminatory assumptions into enforceable policy.
The distinction between compulsory and voluntary programs was often unclear. A procedure might be formally described as voluntary while taking place under intense pressure, incomplete disclosure, economic dependency, institutional confinement, or the threat of losing medical services or custody of children. Meaningful reproductive choice requires more than the absence of explicit physical force.
Birth-control advocacy also had a complicated relationship with eugenics. Contraception could expand individual freedom, but some advocates promoted it as a means of limiting the reproduction of groups considered socially burdensome. Reproductive technologies therefore carried different meanings depending on who controlled them and whether patients possessed genuine autonomy.
Continuing Legacies
The political defeat and public discrediting of formal eugenics did not eliminate its underlying assumptions. Ideas about biological fitness, intelligence, disability, social value, and desirable reproduction continued to influence institutions and public policy.
Modern digital-health systems can reproduce discrimination when algorithms rely on biased datasets or treat disability and illness primarily as undesirable costs. Genetic technologies can also revive questions about selection, enhancement, identity, and the definition of a life worth living.
The history of eugenics demonstrates why scientific claims must be examined in relation to political power. Measurements and classifications are never socially neutral when governments or institutions use them to determine who may reproduce, migrate, receive health care, retain custody of children, or belong to a political community.
Addressing these legacies requires more than condemning historical abuses. It requires informed consent, reproductive justice, disability rights, Indigenous data sovereignty, accountability within medical systems, and meaningful participation by communities that have historically been classified and controlled by outside authorities.
Conclusion
Eugenics and colonialism were deeply interconnected systems of knowledge and power. Eugenics supplied biological explanations for imperial inequality, while colonialism provided institutions and populations through which racial classification, reproductive governance, and social experimentation could be implemented.
The historical record spans British imperial thought, apartheid South Africa, colonial Kenya, caste and population politics in India, the sterilization of Indigenous women in Canada, settler-colonial health projects in Palestine, and reproductive intervention in Mexico and Puerto Rico. Despite important regional differences, these cases share a recurring effort to define some populations as more valuable, capable, healthy, or deserving than others.
Understanding this history helps explain why contemporary discussions of genetics, public health, reproductive policy, disability, and demographic change cannot be separated from questions of race and colonial power. Confronting eugenics requires attention not only to discredited theories but also to the institutions, inequalities, and forms of medical authority through which their legacies continue.
General Histories: Eugenics, Empire, and Colonial Race Science
The History of Science Through the Prism of Race
| Elise K. Burton | BJHS Themes | 2024
Reviews scholarship showing how anthropology, medicine, genetics, and eugenics constructed race across colonial Africa and Asia.
Eugenics, Public Health, and Modern Sexuality
| Mirela David | Cambridge World History of Sexualities | 2024
Connects eugenics with social hygiene, maternal health, sexuality, venereal-disease control, and colonial claims about supposedly backward populations.
Disablism, Racism and the Spectre of Eugenics in Digital Health
| Georgia van Toorn | Journal of Sociology | 2024
Connects contemporary digital-health discrimination to colonial eugenic practices involving institutionalization, segregation, child removal, and sterilization.
Colonialism, Eugenics and ‘Race’ in Central and Eastern Europe
| Marius Turda and Bolaji Balogun | Global Social Challenges Journal | 2023
Examines how eugenics, racial nationalism, whiteness, and coloniality shaped systems of belonging and exclusion in Central and Eastern Europe.
Social Reproduction in the Colonial Global Economy
| Charalampos Tansel | British Journal of Politics and International Relations | 2023
Explores how imperial competition and colonial racial imagery encouraged eugenic anxieties about working-class reproduction and national fitness.
Legacies of Eugenics: Confronting the Past, Forging a Future
| Marius Turda | Ethnic and Racial Studies | 2022
Surveys the international institutional history of eugenics and argues that its racial, colonial, and ableist legacies remain politically consequential.
Eugenics and Scientific Racism
| National Human Genome Research Institute | Genome.gov | 2022
Explains how scientifically false ideas about heredity supported racial hierarchy, segregation, exclusion, involuntary sterilization, and other discriminatory policies.
The History and Historiography of Eugenics
| Marius Turda | Springer Nature | 2021
Surveys changing interpretations of eugenics, including its international circulation and involvement in racial, colonial, welfare, and reproductive policies.
The Power of Heredity and the Relevance of Eugenic History
| Paul A. Lombardo | Genetics in Medicine | 2018
Explains how Francis Galton’s hereditarian theories developed within a society shaped by empire, racial hierarchy, and confidence in biological classification.
Eugenics and Involuntary Sterilization: 1907–2015
| Philip R. Reilly | Annual Review of Genomics and Human Genetics | 2015
Traces compulsory sterilization from early American eugenics laws into later programs disproportionately affecting racialized and colonized communities.
Introduction: Eugenics and the Modern World
| Philippa Levine and Alison Bashford | The Oxford Handbook of the History of Eugenics | 2010
Introduces eugenics as a transnational movement closely connected to imperialism, nationalism, public health, racial classification, and reproductive governance.
U.S. Scientists’ Role in the Eugenics Movement, 1907–1939
| Steven A. Farber | International Journal of Epidemiology | 2008
Documents the participation of prominent scientists in a movement promoting sterilization, immigration restriction, racial hierarchy, and reproductive control.
British Eugenics, Empire and Race
| Pauline M. H. Mazumdar | Manchester University Press | 2007
Investigates debates about heredity and racial difference within British eugenics and their relationship to the preservation of empire.
Race in British Eugenics
| Dan Stone | European History Quarterly | 2001
Demonstrates that British eugenics cannot be understood solely as class politics because it also depended upon accepted imperial hierarchies of race.
Critical Race Theories and the Political Economy of Systemic Racism
| Tim Wise and contributors | Journal of Race, Ethnicity, and Politics | n.d.
Places coerced sterilization within the longer development of colonial rule, scientific racism, patriarchal power, and racialized American law.
Africa and the Colonial Development Project
The Eugenic Underpinnings of Apartheid South Africa
| Carla Turner | Theoria | 2024
Examines how eugenic race science influenced segregationist ideology and contributed to the intellectual foundations of apartheid.
Eugenics and Racism in the Development Episteme
| Corrie Decker and Elisabeth McMahon | The Idea of Development in Africa | 2021
Shows how physical anthropology, Social Darwinism, eugenics, and imperial racism helped establish the intellectual foundations of colonial development.
Race, Science, and the Legitimization of White Supremacy in South Africa
| South African History Online | South African History Online | 2021
Provides an accessible overview of scientific racism, eugenics, segregation, apartheid, and attempts to portray white supremacy as scientifically legitimate.
Transnational Eugenics
| Africa Is a Country | Africa Is a Country | 2016
Reviews the international circulation of eugenics and emphasizes its importance to colonial racial rule in Africa and elsewhere.
The Role of Eugenics and Religion in the Construction of Race in South Africa
| Linda Naicker | Studia Historiae Ecclesiasticae | 2012
Discusses how eugenic theories and religious arguments reinforced racial classification and white supremacy in twentieth-century South Africa.
South Africa: Paradoxes in the Place of Race
| Saul Dubow | The Oxford Handbook of the History of Eugenics | 2010
Analyzes the interaction of eugenics with race, gender, class, white population anxieties, segregation, and South African nationalism.
Project Coast: Eugenics in Apartheid South Africa
| Jerome Amir Singh | Endeavour | 2008
Investigates allegations that apartheid-era biological and chemical warfare research included efforts directed toward racialized reproductive control.
The Layering of History: Eugenics, the Holocaust and Scientific Racism in South Africa
| Gillian Sutton | Yesterday & Today | 2007
Connects South African scientific racism to international eugenics and considers how educators can confront these overlapping histories.
Eugenics in Kenya
| Chloe Campbell | Wellcome Collection | 2007
Examines how British settlers and colonial officials applied eugenic ideas to race, sexuality, intelligence testing, education, and governance in Kenya.
Race and Empire: Eugenics in Colonial Kenya
| Chloe Campbell | Race and Empire | 2007
Shows how eugenic ideas informed settler anxieties about racial boundaries and the political future of British-controlled Kenya.
The American School of Kenya and the Science of Race
| Chloe Campbell | History of Science | 2002
Investigates psychological testing and claims about African intelligence within the racialized educational and political order of colonial Kenya.
For the Sake of the Race: Eugenic Discourses of Feeblemindedness and Motherhood
| Susanne M. Klausen | Journal of Southern African Studies | 1997
Examines medical discourse portraying poor white motherhood and supposed feeblemindedness as threats to the racial future of white South Africa.
Science and Society in Southern Africa
| Saul Dubow | Scientific Racism in Modern South Africa | 1995
Explores how anthropology, biology, psychology, and eugenics helped produce racial knowledge used within colonial and segregationist South Africa.
South Asia: Caste, Population, and Colonial Governance
Population, Eugenics and Reproductive Rights
| Mytheli Sreenivas | South Asia: Journal of South Asian Studies | 2025
Traces connections among colonial population knowledge, eugenics, reproductive rights, abortion policy, and postcolonial population control in India.
Race and Caste: Crises and Histories of the Postcolonial Present
| Debjani Ganguly | Critical Times | 2025
Maps connected histories of race and caste across India, South Africa, and the Caribbean, including their relationship to eugenic thought.
The Sciences of Love: Intimate ‘Democracy’ and the Eugenic Couple in India
| Rohit Sequeira | History of the Human Sciences | 2023
Studies how Marathi writer N. S. Phadke adapted eugenic ideas about companionate marriage, sexuality, and reproductive citizenship in late colonial India.
Caste-ing White Supremacy: Thind, Cisco, and the Politics of Racial Classification
| Harpalani and contributors | Ethnic Studies Review | 2023
Shows how colonial theories of caste and race intersected with eugenics and American legal definitions of whiteness.
Darwin in India: Anticolonial Evolutionism at the Dawn of the Twentieth Century
| Inder S. Marwah | Perspectives on Politics | 2023
Shows how Indian anticolonial thinkers appropriated evolutionary language to challenge imperial theories that classified colonized societies as developmentally inferior.
The Role of Scientific Apartheid in Shaping Colonial Attitudes
| Shreya Bhattacharya | University of Oxford | 2021
Examines how imperial masculinity, scientific hierarchy, and eugenic reasoning affected intellectual and scientific life in British India.
Reproducing Caste: Savarna Eugenics, Then and Now
| Shubhangi Mehrotra | In Plainspeak | 2017
Examines how upper-caste reformers combined birth control with eugenic ideas about national strength, respectable motherhood, and caste reproduction.
South Asia’s Eugenic Past
| Sarah Hodges | The Oxford Handbook of the History of Eugenics | 2010
Relates Indian eugenics to colonial poverty, voluntary associations, birth-control advocacy, caste hierarchy, and projects for national regeneration.
Caste Cannot Preserve a Nonexistent ‘Racial Purity’
| B. R. Ambedkar | Columbia University | 1936
Rejects claims that caste restrictions preserve biological racial purity and exposes contradictions in supposedly eugenic explanations of caste.
Indigenous Peoples and Settler Colonialism
Echoes of Eugenics: Confronting Its Effects in Indigenous Communities
| Christina A. Sherman and contributors | Genetics | 2025
Reviews forced sterilization, blood quantum, genetic research, identity regulation, and continuing eugenic harms experienced by Indigenous peoples in North America.
Forced and Coerced Sterilization of Indigenous Women
| Jennifer Leason | Canadian Family Physician | 2021
Explains how eugenics, systemic racism, colonial health care, and failures of informed consent contributed to sterilization abuses against Indigenous women.
Forced Sterilization of Indigenous Women: An Act of Genocide or Policing Women’s Bodies?
| Mirabel Akbari | Critical Studies in Rights and Identity | 2021
Considers whether coerced sterilization should be understood as genocide, gendered state violence, and an ongoing colonial practice.
Sterilization of Indigenous Women in Canada
| Karen Stote | The Canadian Encyclopedia | 2019
Summarizes how provincial eugenics laws and later medical practices disproportionately targeted First Nations, Métis, and Inuit women.
Forced Sterilization of Indigenous Women in Canada
| Native Women’s Association of Canada | Expert Forum Summary Report | 2019
Documents the history, continuing allegations, health consequences, and colonial context of coerced sterilization involving Indigenous women.
Reproductive Injustice: The Forced Sterilization of Indigenous Women in Canada
| International Justice Resource Center and partners | Thematic Report | 2019
Presents coerced sterilization as a violation of bodily autonomy rooted in discriminatory health systems and Canada’s history of settler colonialism.
The Coerced Sterilization of Indigenous Women
| Karen Stote | New Internationalist | 2018
Connects historical sterilization laws with later reproductive abuses occurring through Canadian hospitals and family-planning programs.
Why Canada’s Coerced Sterilization of Indigenous Women Is Not Ancient History
| Leyland Cecco | The Guardian | 2018
Reports allegations of coerced sterilization while placing them within Canada’s longer history of colonial reproductive control.
Second-Rate Victims: The Forced Sterilization of Indigenous Peoples in Canada
| Lisa Marie Pegoraro | Settler Colonial Studies | 2015
Interprets compulsory sterilization as an instrument of settler colonialism and examines why Indigenous victims received limited public recognition.
An Act of Genocide: Colonialism and the Sterilization of Aboriginal Women
| Karen Stote | Fernwood Publishing | 2015
Argues that Canadian sterilization policies formed part of a broader colonial project to reduce Indigenous populations and control Indigenous women’s reproduction.
Eugenics and the Indians
| CBC Radio Ideas | Canadian Broadcasting Corporation | 2011
Explores how Canadian eugenic thinking affected Indigenous peoples through sterilization, institutionalization, child removal, and racially discriminatory social policy.
The Sterilization of Leilani Muir
| Glynis Whiting | National Film Board of Canada | 1996
Documents one survivor’s institutionalization and sterilization under Alberta’s eugenics law and her later legal challenge against the province.
Palestine and Settler-Colonial Health
Children Are the Treasure and Property of the Nation
| Frances S. Hasso | Buried in the Red Dirt | 2021
Examines eugenics within Zionist settler-colonial health projects and the treatment of children, women, reproduction, and demographic expansion in Palestine.
Zionism, Eugenics, and the Demographic Politics of Settlement
| Frances S. Hasso | Duke University Press | 2021
Places reproductive health and child welfare within the demographic and eugenic priorities of the Zionist settlement project.
Latin America, Puerto Rico, and Colonial Population Control
From Preventive Eugenics to Slippery Eugenics
| Rocío Sánchez-Rivera | Sociology of Health & Illness | 2023
Connects Mexico’s eugenic history to contemporary sterilization procedures disproportionately imposed on Indigenous communities.
No Más Bebés
| Renee Tajima-Peña and Virginia Espino | PBS Independent Lens | 2015
Tells how Mexican immigrant women challenged coerced sterilizations performed at a Los Angeles public hospital during the 1960s and 1970s.
Modern Colonization by Medical Intervention
| Nicole Trujillo-Pagán | Brill | 2013
Examines how American physicians used medicine, public health, and racialized representations of Puerto Ricans to consolidate United States colonial authority.
Sterilized in the Name of Public Health
| Alexandra Minna Stern | American Journal of Public Health | 2004
Traces how California sterilization programs targeted people racialized through ideas about Mexican ancestry, immigration, disability, poverty, and social fitness.
La Operación
| Ana María García | Women Make Movies | 1982
Documents the mass sterilization of Puerto Rican women and situates the practice within United States colonialism, industrialization, and population policy.
Puerto Rico’s Population Trials
| PBS American Experience | Public Broadcasting Service | n.d.
Explains how colonial inequality shaped contraceptive experimentation and reproductive intervention involving Puerto Rican women.
Eugenics and Birth Control
| PBS American Experience | Public Broadcasting Service | n.d.
Describes how birth-control advocacy overlapped with racist, classist, nativist, and eugenic efforts to regulate the reproduction of supposedly unfit groups.
