The worldwide Eugenics movement gained strength in the U.S. at the end of the 1890s, when theories of selective breeding espoused by British anthropologist Francis Galton and his protégé Karl Pearson, gained currency. Connecticut was the first of many states, beginning in 1896, to pass marriage laws with eugenic provisions, prohibiting anyone who was "epileptic, imbecile or feeble-minded" from marrying. The noted American biologist, Charles Davenport, became the director of biological research at a station in Cold Spring Harbor in New York in 1898. Six years later the Carnegie Institute provided the funding for Davenport to create the Station for Experimental Evolution. Then, in 1910, Davenport and Harry H. Laughlin took advantage of their positions at the Eugenics Record Office to promote eugenics.
The ERO concluded after years of gathering data on families that the poor were the main source of the “unfit.” Davenport and other highly regarded eugenicists such as psychologist Henry H. Goddard and conservationist Madison Grant started a campaign to address the problem of the "unfit." Goddard, using data based on his Kallikak family research, lobbied for segregation, while Davenport preferred immigration restriction and sterilization as primary methods. Grant, the most extreme of the three, agreed with both of his colleagues, and even considered extermination as a possible solution.
A major influence on the eugenics movement was Herbert Spencer, an English philosopher and prominent political theorist. He is best known as the father of social Darwinism, a school of thought that applied the evolutionist theory of "survival of the fittest"—a phrase coined by Spencer—to human societies.
By the 1900s, the scientific community’s understanding of race was both essentialist—defining each race by certain biological and social characteristics—and taxonomic (hierarchical). Scientists were struggling with the concept of race in divergent ways. Aleš Hrdlicka and Earnest Hooten, two prominent physical anthropologists also trained as physicians, were influential at a time when the field focused mostly on anatomy and physiological variation.
Charles Davenport earned a Ph.D. in biology in 1892 from Harvard, and later became an instructor of zoology there. As a biologist, he pioneered the development of quantitative standards of taxonomy. A follower of the biometric approach to evolution which had been developed by Francis Galton and Karl Pearson, Davenport was also on the editorial committee of Pearson's journal, Biometrika. After Mendel's laws of heredity were “rediscovered”, Davenport became a strict convert to the Mendelian school of genetics. His 1911 book, Heredity in Relation to Eugenics, was a major work in the history of eugenics. Along with an assistant, Davenport also studied the question of miscegenation, or, as he put it, "race crossing" in humans. In 1929, he published Race Crossing in Jamaica, which purported to give statistical evidence about the dangers of miscegenation between blacks and whites.
Madison Grant, a lawyer known more as a conservationist and eugenist created the "racialist movement" in America advocating the extermination of "undesirables" and certain "race types" from the human gene pool. He played a critical role in restrictive U.S. immigration policy and anti-miscegenation laws. His work provided the justification for Nazi policies of forced sterilization and euthanasia. He wrote two of the seminal works of American racialism: The Passing of the Great Race (1916) and The Conquest of a Continent (1933). The Passing of the Great Race gained immediate popular success and established Grant as an authority in anthropology, and laid the groundwork for his research in eugenics.
In 1911, a starving and nearly naked Indian man took shelter in a northern California slaughterhouse. He was turned over to anthropologist Thomas T. Waterman, who brought him to live at the University of California's anthropology museum. He was given the name Ishi, which meant "man" in his native language. Most of the members of Ishi's tribe, the Yahi-Yana, had been massacred during the California Gold Rush. Dubbed "the last wild man in America," he became a popular attraction, and in his first six months at the museum, 24,000 visitors watched him demonstrate arrow-making and fire-building. Ishi lived at the museum until he died of tuberculosis in 1916.
The American Journal of Physical Anthropology was founded by Aleš Hrdlicka in 1918, and he remained editor of the publication until his death. Hrdlicka also helped found the American Association of Physical Anthropologists in 1929, and from 1898 to 1925 was involved in anthropological investigations throughout the world. He was famous for his work on anthropometry, early man and human evolution, and in particular for his theory of migration of Native Americans in Siberia and Alaska.
In 1926, the American Association of Physical Anthropology and the National Research Council organized a Committee on the Negro, which focused on the anatomy of blacks and reflected the racism of the time. Among those appointed to the Committee on the Negro were Hrdlicka, Earnest Hooton and eugenist Charles Davenport. In 1927 the committee endorsed a comparison of African babies with young apes. Ten years later the group published findings in the American Journal of Physical Anthropology to "prove that the negro race is phylogenetically a closer approach to primitive man than the white race."
Earnest Albert Hooton was a physical anthropologist known for his work on racial classification and his popular books, including Up From The Apes, in which he described the morphological characteristics of different 'primary races' and various 'subtypes.' At Oxford he studied with R.R. Marrett. He was hired by Harvard University, where he taught until his death in 1954. While at Harvard, he was also Curator of Somatology at the Peabody Museum for Archaeology and Ethnology in Boston. Hooton was also instrumental in promulgating the constitutional approach to human biology, which theorized a correlation between physique, temperament and race. Perhaps more than any scientist of his time, Hooton did more to establish racial stereotypes about black athleticism and black criminality from an anthropological framework.