page_title: Scientific racism
section_title: Justification of slavery in the United States
hierarchical_section_title: Scientific racism / Ideological applications / Justification of slavery in the United States
caption_attribution_description: English: Low-resolution image of Samuel A. Cartwright, the psychiatrist.
context_page_description: Scientific racism, sometimes termed biological racism, is the pseudoscientific belief that empirical evidence exists to support or justify racism, racial inferiority, or racial superiority. Historically, scientific racism received credence throughout the scientific community, but it is no longer considered scientific.
  Scientific racism employs anthropology, anthropometry, craniometry, and other disciplines or pseudo-disciplines, in proposing anthropological typologies supporting the classification of human populations into physically discrete human races, some of which might be asserted to be superior or inferior to others. Scientific racism was common during the period from the 1600s to the end of World War II. Since the second half of the 20th century, scientific racism has been criticized as obsolete and discredited, yet has persistently been used to support or validate racist world-views, based upon belief in the existence and significance of racial categories and a hierarchy of superior and inferior races.
context_section_description: In the United States, scientific racism justified Black African slavery to assuage moral opposition to the Atlantic slave trade. Alexander Thomas and Samuell Sillen described black men as uniquely fitted for bondage, because of their "primitive psychological organization". In 1851, in antebellum Louisiana, the physician Samuel A. Cartwright (1793–1863) wrote of slave escape attempts as "drapetomania", a treatable mental illness, that "with proper medical advice, strictly followed, this troublesome practice that many Negroes have of running away can be almost entirely prevented". The term drapetomania (mania of the runaway slave) derives from the Greek δραπέτης (drapetes, "a runaway [slave]") and μανία (mania, "madness, frenzy") Cartwright also described dysaesthesia aethiopica, called "rascality" by overseers. The 1840 United States Census claimed that Northern, free blacks suffered mental illness at higher rates than did their Southern, enslaved counterparts. Though the census was later found to have been severely flawed by the American Statistical Association, to John Quincy Adams and others it became a political weapon against abolitionists. Southern slavers concluded that escaping Negroes were suffering from "mental disorders".
  At the time of the American Civil War (1861–65), the matter of miscegenation prompted studies of ostensible physiological differences between Caucasians and Negroes. Early anthropologists, such as Josiah Clark Nott, George Robins Gliddon, Robert Knox, and Samuel George Morton, aimed to scientifically prove that Negroes were a human species different from the white people species; that the rulers of Ancient Egypt were not African; and that mixed-race offspring (the product of miscegenation) tended to physical weakness and infertility. After the Civil War, Southern (Confederacy) physicians wrote textbooks of scientific racism based upon studies claiming that black freemen (ex-slaves) were becoming extinct, because they were inadequate to the demands of being a free man—implying that black people benefited from enslavement.
  In Medical Apartheid, Harriet A. Washington noted the prevalence of two different views on blacks in the 19th century: the belief that they were inferior and "riddled with imperfections from head to toe", and the idea that they didn't know true pain and suffering because of their primitive nervous systems (and that slavery was therefore justifiable). Washington noted the failure of scientists to accept the inconsistency between these two viewpoints, writing that "in the eighteenth and nineteenth centuries, scientific racism was simply science, and it was promulgated by the very best minds at the most prestigious institutions of the nation. Other, more logical medical theories stressed the equality of Africans and laid poor black health at the feet of their abusers, but these never enjoyed the appeal of the medical philosophy that justified slavery and, along with it, our nation's profitable way of life."
  Even after the end of the Civil War, some scientists continued to justify the institution of slavery by citing the effect of topography and climate on racial development. Nathaniel Shaler, a prominent geologist at Harvard University from 1869-1906, published the book Man and the Earth in 1905 describing the physical geography of different continents and linking these geologic settings to the intelligence and strength of human races that inhabited these spaces. Shaler argued that North American climate and geology was ideally suited for the institution of slavery.
caption: Dr Samuel Cartwright, M.D.
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