American eugenics in the U.S. was a state-backed pseudoscientific movement that peaked in the early 20th century and aimed to “improve” the population by controlling who could reproduce. Its main results were forced sterilization laws, immigration restriction arguments, segregation, and discriminatory medical policy, with Black, Indigenous, Latinx, immigrant, poor, disabled, and institutionalized people disproportionately targeted.nature+2
The movement took hold around the 1900s through figures like Charles Davenport and Harry Laughlin, and through institutions such as the Eugenics Record Office at Cold Spring Harbor, which collected family data and lobbied for eugenic laws. State governments then translated those ideas into law, and the U.S. Supreme Court’s Buck v. Bell decision in 1927 upheld forced sterilization as constitutional, which encouraged broader use of these policies.ebsco+4
A lot of what happened was not neutral science but coercive population control disguised as research or public health. The most infamous federal example was the Tuskegee syphilis study, run by the U.S. Public Health Service from 1932 to 1972, in which 600 Black men were enrolled without informed consent and denied effective treatment even after penicillin was available. The study produced little useful medical knowledge but caused severe harm, including preventable deaths and transmission to spouses and children.cdc+2
Eugenics and related abuse fell hardest on minority people and the poor. Native American women were sterilized without permission by the Indian Health Service in the 1970s, with a GAO review finding 3,406 unauthorized sterilizations in just four IHS regions between 1973 and 1976. Black women in the South were also sterilized through federally funded or coerced programs; the Relf v. Weinberger case exposed how poor women were pressured or tricked into sterilization and led to stronger informed-consent rules.nlm.nih+3
Several levels of government were involved. At the federal level, the U.S. Public Health Service ran Tuskegee, the Department of Health, Education and Welfare funded or regulated sterilization programs, and the Indian Health Service was implicated in the sterilization of Native women. At the state level, sterilization boards, health departments, mental institutions, and courts carried out or authorized many of the procedures, often under laws that treated disabled and marginalized people as unfit to reproduce.splcenter+4
Yes, a major part of this history was secrecy, deception, and lack of consent. Tuskegee participants were misled about what was happening and denied treatment; many sterilization victims were not told clearly, or were pressured with false explanations, threats to benefits, or institutional authority. In that sense, the “secret” was not only hidden documents but also a system that relied on asymmetry of power, racial hierarchy, and medical authority to keep victims uninformed.britannica+4
The overall result was not a successful improvement of human life but a long record of abuse, injury, and racialized control. Eugenics failed as science, but it succeeded for decades as policy, and its legacy shaped American medicine, law, and distrust of institutions long after the formal movement faded.genome+2