Doctors and Scientists Who Promoted Eugenics
Doctors and Scientists Who Promoted Eugenics
Eugenics was not merely a fringe political doctrine. During the late nineteenth and early twentieth centuries, it was promoted by respected doctors, biologists, psychologists, psychiatrists, geneticists, anthropologists, statisticians, public-health officials, and university administrators. These authorities claimed that human characteristics such as intelligence, disability, criminality, poverty, mental illness, and social behavior were primarily inherited.
Support from scientific and medical professionals gave eugenics an appearance of legitimacy. Their research, publications, professional organizations, conferences, university courses, and expert testimony helped transform discriminatory beliefs into immigration restrictions, marriage regulations, institutional segregation, compulsory sterilization, and, in Nazi Germany, systematic medical killing and genocide.
The Scientific Origins of Eugenics
British scientist Francis Galton coined the term “eugenics” and argued that selective reproduction could improve the hereditary qualities of human populations. His research on heredity, statistics, intelligence, and twins established methods later used by other eugenicists.
Karl Pearson expanded Galton’s statistical work and helped institutionalize biometric approaches to human heredity. Although these researchers presented their conclusions as objective science, their measurements frequently reflected existing assumptions about race, class, disability, gender, and social worth.
Eugenicists treated complex social circumstances as biological characteristics. Poverty, limited education, criminal convictions, institutionalization, alcoholism, sexual behavior, and dependence on public assistance were regularly described as evidence of hereditary inferiority.
American Scientists and the Eugenics Movement
American biologist Charles Davenport became one of the most influential organizers of eugenics. Through the Eugenics Record Office at Cold Spring Harbor, Davenport and his associates collected family histories intended to demonstrate that supposedly undesirable characteristics were inherited.
Harry Hamilton Laughlin, a senior official at the Eugenics Record Office, became a leading advocate of compulsory sterilization and immigration restriction. His model sterilization legislation influenced laws adopted by numerous American states and provided a precedent for Nazi Germany’s sterilization program.
Henry Fairfield Osborn and Madison Grant promoted racial hierarchy, Nordic supremacy, and restrictive immigration policies. Along with Davenport, they participated in organizations that presented racial classification and white supremacy as legitimate scientific conclusions.
The American Eugenics Society spread eugenic ideas through lectures, exhibitions, publications, conferences, educational campaigns, and “fitter family” competitions. Doctors and scientists used their professional standing to convince the public that reproductive control was a modern and progressive response to social problems.
Intelligence Testing and Psychology
Psychologist Henry Herbert Goddard introduced the Binet-Simon intelligence test to the United States and used it to classify people according to supposedly inherited mental ability. His influential book The Kallikak Family portrayed intellectual disability, poverty, criminality, and sexual behavior as hereditary conditions.
Goddard’s conclusions rested on misleading genealogies, subjective classifications, and altered photographs. Nevertheless, his work helped justify institutional segregation, immigration screening, reproductive restrictions, and the confinement of people labeled “feebleminded.”
Stanford psychologist Lewis Terman revised the intelligence test into the Stanford-Binet test. Terman interpreted differences in test performance as evidence of inherited intellectual ability and supported eugenic conclusions about race, class, education, and reproduction.
Intelligence tests appeared objective because they produced numerical scores. In practice, they often measured differences in language, education, culture, economic opportunity, and familiarity with testing. Eugenic psychologists converted these inequalities into purported proof of biological hierarchy.
Doctors and Compulsory Sterilization
Physicians played an important role in translating eugenic theory into medical practice. They diagnosed hereditary “defects,” recommended sterilization, served on institutional review boards, testified in legal proceedings, and performed reproductive surgeries.
Indiana physician Harry Sharp used vasectomy to sterilize incarcerated men and became an influential advocate of eugenic sterilization. His activities contributed to Indiana’s enactment of the first compulsory sterilization law in the United States.
Biologist Paul Popenoe supported California’s sterilization program and coauthored Applied Eugenics, an influential textbook advocating selective marriage, segregation, immigration restriction, and sterilization. He later carried some eugenic assumptions into his nationally recognized career as a marriage counselor.
Harry Laughlin supplied lawmakers with a model sterilization law intended to withstand constitutional challenges. The resulting policies targeted people classified as intellectually disabled, mentally ill, epileptic, criminal, dependent, sexually immoral, or otherwise socially undesirable.
John Harvey Kellogg and Race Betterment
Physician and health reformer John Harvey Kellogg was a prominent advocate of racial betterment. He founded the Race Betterment Foundation, sponsored research, and organized conferences attended by doctors, scientists, educators, and social reformers.
Kellogg used his reputation as a health authority to introduce eugenic ideas to a broad audience. He supported segregation and reproductive restrictions intended to prevent people considered biologically or socially unfit from having children.
His career demonstrates how eugenics became connected to seemingly progressive movements involving public health, preventive medicine, sanitation, nutrition, and social reform. Eugenic policies were frequently presented as efficient and scientifically enlightened rather than discriminatory.
Birth Control and Selective Reproduction
Some advocates of contraception also supported eugenic attempts to regulate who should reproduce. Marie Stopes promoted women’s access to birth control while expressing strong eugenic beliefs and opposing parenthood among people she considered unfit.
Australian physician Norman Haire supported birth control but also believed reproductive medicine could influence the supposed biological quality of future generations. Such positions blurred the distinction between voluntary reproductive freedom and coercive population control.
Eugenic reproductive policies disproportionately targeted poor families, disabled people, institutionalized patients, immigrants, racial minorities, Indigenous communities, incarcerated people, and women whose sexual behavior violated prevailing social expectations.
Disability, Epilepsy, and Mental Illness
Doctors and scientists frequently classified disabled people as hereditary threats. Diagnoses became tools for determining who could marry, live independently, immigrate, leave an institution, or have children.
Harvard neurologist William Lennox treated people with epilepsy while also supporting reproductive restrictions intended to prevent them from having children. Epilepsy was commonly included in sterilization statutes despite the limited scientific basis for treating it as evidence of hereditary unfitness.
Psychiatric geneticists studied schizophrenia and other mental illnesses within an explicitly eugenic framework. Ernst Rüdin and Bruno Schulz investigated psychiatric heredity while advocating sterilization policies directed at people believed likely to transmit mental disorders.
By transforming disability and illness into judgments about social worth, medical professionals helped normalize institutionalization, segregation, sterilization, and the denial of reproductive autonomy.
Universities and Academic Eugenics
Universities provided eugenics with institutional authority. Professors conducted research, taught courses, trained future doctors and public officials, maintained archives, published textbooks, and advised governments.
Stanford University became an important center of American eugenic thought. Its founding president, zoologist David Starr Jordan, promoted hereditary nationalism, immigration restriction, racial hierarchy, selective reproduction, and claims about the biological consequences of war.
Lewis Terman and other Stanford academics used intelligence testing and educational classification to support assertions about inherited ability. Their work helped embed eugenic assumptions within psychology, education, and public policy.
At the University of Virginia, physicians and scientists such as Harvey Ernest Jordan and Lawrence Royster promoted ideas supporting racial hierarchy, segregation, sterilization, and racial-integrity legislation.
The involvement of prominent universities demonstrates that eugenics developed inside respected academic institutions rather than exclusively within marginal political organizations.
Eugenics in Medical and Scientific Publications
Professional journals helped circulate eugenic arguments among doctors and scientists. Articles in leading medical publications discussed sterilization, hereditary disease, racial classification, and reproductive control as legitimate matters of scientific and public-health policy.
Medical terminology gave discriminatory judgments an appearance of clinical neutrality. Labels such as “defective,” “degenerate,” “feebleminded,” and “hereditarily unfit” concealed moral, racial, and class prejudice behind diagnostic language.
Professional organizations and scientific societies further legitimized eugenics by organizing conferences, sponsoring studies, distributing educational materials, and rewarding researchers. Scientific authority helped move eugenic proposals from academic discussion into law and institutional practice.
Scientific Racism and the Legacy of Slavery
Eugenics developed within a longer history of slavery, colonialism, racial classification, and scientific racism. Researchers used anthropometric measurements, family histories, intelligence tests, and demographic data to divide populations into supposedly superior and inferior biological groups.
Charles Davenport and other researchers investigated mixed-race families in attempts to portray racial characteristics and social behavior as inherited. These studies treated Black people as objects of biological measurement and reinforced racial assumptions inherited from slavery.
Madison Grant, Henry Fairfield Osborn, and members of organizations such as the Galton Society promoted Nordic supremacy and restrictive immigration policies. Their theories converted white supremacy into a purportedly scientific system of human classification.
Eugenics Outside the United States
Eugenics became an international movement, although it took different forms in different countries. Doctors, psychiatrists, anthropologists, and public-health officials adapted eugenic theories to local debates about national identity, race, immigration, population growth, public health, and modernization.
In Latin America, figures including Renato Kehl, José Ingenieros, and Carlos Chagas connected eugenics to racial classification, reproduction, immigration, sanitation, and national development.
In Turkey, physicians treated eugenics as a framework for medical authority and social reform. They connected maternal health, reproductive behavior, population policy, and public health to the proposed biological improvement of the nation.
International adoption of eugenics demonstrates that it was not confined to one political ideology or national context. It appealed to professionals who believed scientific management could solve complex social and economic problems.
German Racial Hygiene and Nazi Medicine
German racial hygienists such as Alfred Ploetz, Ernst Rüdin, Eugen Fischer, Fritz Lenz, Otmar von Verschuer, and Franz Josef Kallmann promoted theories of hereditary fitness and biological hierarchy before and during the Nazi period.
Ernst Rüdin helped establish psychiatric genetics and participated in developing Nazi sterilization policy. Eugen Fischer’s anthropological research supported racial classification and policies directed against people of African and mixed ancestry.
Pathologists and medical academics, including Martin Staemmler, Ludwig Aschoff, Robert Rössle, and Georg B. Gruber, used their professional authority to legitimize racial hygiene and compulsory sterilization.
German doctors did not simply obey policies created by political leaders. Many actively shaped racial legislation, joined Nazi organizations, developed administrative procedures, selected victims, conducted research, and provided the personnel required to carry out medical crimes.
Otmar von Verschuer, Josef Mengele, and Twin Research
Otmar von Verschuer became a leading German racial hygienist and researcher on twins. He maintained international professional relationships and supervised Josef Mengele, who later conducted experiments on prisoners at Auschwitz.
Twin research had earlier been promoted by Francis Galton as a method of separating hereditary influences from environmental ones. Under Nazi racial policy, this scientific interest became connected to coercive experimentation, biological collection, and lethal violence.
Mengele supplied Verschuer’s research network with biological materials obtained from Auschwitz prisoners. Their relationship illustrates how academic institutions and recognized scientists benefited from crimes committed within concentration camps.
Physicians and Nazi Medical Killing
Physicians occupied leadership positions in compulsory sterilization, child killing, Aktion T4, concentration-camp experimentation, and other Nazi programs. They examined patients, reviewed medical records, approved deaths, designed experiments, and developed bureaucratic systems for selecting victims.
Medical professionals portrayed disabled and psychiatric patients as hereditary dangers and economic burdens. Diagnostic language helped transform murder into an administrative and supposedly therapeutic procedure.
The killing programs developed personnel, technology, bureaucratic experience, and methods later used in the Holocaust. Medicine was transformed from a profession intended to care for individuals into an instrument for classifying, excluding, experimenting upon, and killing populations.
The Continuing Legacy of Eugenics
Eugenics lost public legitimacy after its association with Nazi atrocities became widely recognized, but many participating doctors and scientists retained professional positions after the Second World War. Some continued influential careers in genetics, psychiatry, anthropology, psychology, education, and medicine.
Eugenic assumptions also survived within institutions and policies. Intelligence classifications, involuntary sterilization, disability discrimination, racialized medical research, reproductive coercion, and genetic determinism continued after the formal decline of organized eugenics.
Modern scientific institutions increasingly confront this history by examining archives, renaming buildings and programs, reviewing professional honors, and acknowledging the people harmed by eugenic policies.
Understanding this history is important because scientific methods do not automatically eliminate prejudice. Research can reproduce existing inequalities when investigators treat social categories as biological facts, overlook environmental conditions, or allow political objectives to shape scientific conclusions.
Conclusion
Eugenics acquired influence because respected professionals presented it as legitimate science and responsible public policy. Doctors, scientists, psychologists, psychiatrists, geneticists, anthropologists, statisticians, and university leaders supplied the research, language, institutions, and authority that allowed eugenic ideas to become government policy.
Their activities contributed to institutional segregation, immigration restriction, marriage regulation, compulsory sterilization, racial persecution, medical experimentation, and mass killing. The history of eugenics therefore cannot be separated from the history of modern medicine, genetics, psychology, public health, and higher education.
Examining the individuals and institutions that promoted eugenics is not merely an exercise in assigning historical blame. It demonstrates the need for informed consent, reproductive autonomy, disability rights, scientific accountability, ethical oversight, and the participation of affected communities in decisions about medical research and public policy.
Stanford Scientists and Eugenics
The Specter of Eugenics
| Stanford Medicine Lane Library | Stanford University | September 12, 2025
This exhibit examines the eugenic beliefs of Stanford president and zoologist David Starr Jordan. Jordan promoted ideas about hereditary fitness, racial hierarchy, selective reproduction, immigration restriction, and the supposedly damaging effects of war on a nation’s biological quality.
Teaching Race Now: Stanford’s History of Racism and Eugenics
| Stanford Center for Comparative Studies in Race and Ethnicity | Stanford University | May 12, 2025
This discussion considers how scientists associated with Stanford, particularly David Starr Jordan and psychologist Lewis Terman, promoted racial hierarchy and eugenics. It argues that universities must acknowledge how respected academics helped make discriminatory theories appear scientifically credible.
Eugenics at Stanford: Jordan, Terman, and Other Legacies
| Murphy Halliburton | Stanford Historical Society | No date
This presentation examines the eugenic commitments of zoologist David Starr Jordan, psychologist Lewis Terman, and other Stanford academics. Jordan advocated hereditary nationalism, while Terman used intelligence testing to rank children and promote claims about inherited ability.
Eugenics at Stanford: Jordan, Terman, and Other Legacies—Archival Presentation
| Murphy Halliburton | Stanford University Libraries | No date
Archival research presented here identifies Stanford as a major center of eugenic thought. It explores how Jordan, Terman, and their colleagues connected academic science to racial hierarchy, intelligence testing, immigration restriction, education, and selective reproduction.
Lewis Madison Terman Papers
| Stanford University Archives | Stanford University | No date
This archival collection documents psychologist Lewis Terman’s research on intelligence testing, gifted children, racial difference, and eugenics. Terman’s revisions of the Stanford-Binet test helped institutionalize classifications that he often interpreted as evidence of inherited mental ability.
American Physicians, Scientists, and Eugenic Organizations
The Legacy of Eugenics
| Sheila Kaplan | UC Berkeley School of Public Health | June 20, 2024
This article examines the continuing legacy of eugenic thought in public health and scientific research. It explains how respected medical and scientific authorities gave legitimacy to discriminatory ideas about heredity, disability, race, reproduction, and social worth.
Vasectomy for Male Sterilization
| Audrey D. Grossman | Embryo Project Encyclopedia | June 3, 2024
This history explains how physician Harry Sharp used vasectomy to sterilize incarcerated men in Indiana and became an influential advocate of eugenic sterilization. Sharp’s work contributed to Indiana’s adoption of the first compulsory sterilization law in the United States.
“Ridding the Race of His Defective Blood”—Eugenics in the New England Journal of Medicine
| Paul A. Lombardo | New England Journal of Medicine | January 6, 2024
Historian Paul Lombardo investigates how physicians used prominent medical publications to promote eugenic sterilization and other forms of reproductive control. The article demonstrates that eugenics circulated through mainstream medicine rather than remaining confined to extremist organizations.
“To Rid Society of Imbeciles”: The Impact of Dr. John Harvey Kellogg’s Stand for Eugenics
| Kayla Kirsch | University of Michigan School of Public Health | December 12, 2022
This article explores physician John Harvey Kellogg’s advocacy of eugenics and his role in organizing the Race Betterment Foundation. Kellogg helped introduce eugenic ideas to broad audiences through conferences, publications, health reform, and support for segregation and sterilization.
The Galton Society for the Study of the Origin and Evolution of Man
| Grace Fitzgerald | Embryo Project Encyclopedia | June 3, 2021
This article examines an organization established by anthropologist Madison Grant, zoologist Henry Fairfield Osborn, and eugenicist Charles Davenport. Its members promoted racial classification, Nordic supremacy, immigration restriction, and biological explanations of social inequality.
Henry Herbert Goddard (1866–1957)
| Nathaniel Ross | Embryo Project Encyclopedia | May 6, 2021
Psychologist Henry Goddard introduced the Binet-Simon intelligence test to the United States and classified people according to supposedly inherited mental ability. His work supported institutional segregation, immigration screening, reproductive restrictions, and other eugenic policies.
Understanding Our Eugenic Past to Take Steps Towards Scientific Accountability
| Rori Rohlfs | Genes to Genomes | June 8, 2020
This article examines the eugenic history of genetics and calls on scientists to confront the discriminatory activities of earlier researchers. It emphasizes how professional organizations, universities, and scientific reputations helped normalize eugenics.
The “Undesirable Epileptic”
| Aparna Nair | Wellcome Collection | February 27, 2020
This article examines the role of physicians and scientists in defining people with epilepsy as biologically undesirable. Harvard neurologist William Lennox treated epilepsy while also advocating reproductive restrictions intended to prevent people with the condition from having children.
Zenderland’s Biography of Henry Goddard
| Russell T. Warne | Psychology Today and Personal Scholarly Commentary | October 15, 2019
This review discusses Henry Goddard’s work in intelligence testing and eugenics. It considers his claims about hereditary intellectual disability, the methodological failings of the Kallikak study, and his influence on education, psychology, immigration policy, and institutionalization.
The Sociopolitical Impact of Eugenics in America
| Michael Lee | Voces Novae, Chapman University | 2019
This study describes how scientists, physicians, legislators, and reformers built an American system of eugenic education and sterilization. It considers how scientific claims were translated into public programs and laws aimed at people labeled socially or biologically unfit.
Scientist of the Day: Paul Popenoe
| William B. Ashworth Jr. | Linda Hall Library | October 16, 2018
This biographical article examines biologist Paul Popenoe’s transformation from plant explorer to prominent American eugenicist. Popenoe supported compulsory sterilization in California and coauthored Applied Eugenics, an influential textbook advocating reproductive control.
John Harvey Kellogg
| American Experience | PBS | October 12, 2018
Physician and health reformer John Harvey Kellogg became a prominent advocate of racial betterment. He worked with Charles Davenport, sponsored eugenic research, and organized Race Betterment Conferences that brought doctors, scientists, and reformers together.
America’s Hidden History: The Eugenics Movement
| Philip Reilly | Nature Education | September 18, 2014
This article surveys the American eugenics movement and the role of heredity researchers in promoting it as legitimate science. It connects scientific advocacy to sterilization statutes, institutional confinement, marriage restrictions, and immigration policy.
Harry Hamilton Laughlin (1880–1943)
| Cecilia Chou | Embryo Project Encyclopedia | December 19, 2014
Harry Laughlin directed the Eugenics Record Office and became one of the leading advocates of compulsory sterilization and immigration restriction. His model sterilization law influenced numerous American states and provided a precedent for Nazi Germany’s 1933 sterilization legislation.
The American Eugenics Society (1926–1972)
| Rachel Gur-Arie | Embryo Project Encyclopedia | November 22, 2014
This article examines an organization founded by Madison Grant, Harry Laughlin, Henry Crampton, Irving Fisher, and Henry Fairfield Osborn. Scientists and physicians used the society to disseminate eugenics through exhibitions, contests, lectures, publications, and educational campaigns.
U.S. Scientists’ Role in the Eugenics Movement
| Steven A. Farber | The Linacre Quarterly | August 2008
This study evaluates the involvement of American biologists and geneticists in eugenics between 1907 and 1939. It describes how researchers endorsed coercive sterilization even though their hereditary claims lacked sufficient scientific evidence.
