The eugenics movement which emerged in Europe and the United States around the turn of the last century was rooted in assumptions about the existence of distinct biological races, with “Anglo-Saxon” societies as the civilizing bedrock of modernity. Supporters of eugenics advocated policies of segregation and apartheid in order to protect the “well-born” from contamination. Its leaders believed that a variety of social successes (wealth, political leadership, intellectual discoveries) and social problems (poverty, illegitimacy, crime, mental illness, and unemployment) could be traced to inherited, biological attributes associated with “racial temperament”. Is there any other conclusion, asked a popular 1926 textbook, that “the Negro lacks in his germ plasm excellence of qualities which the white race possesses, and which are essential for success in competition with the white races at the present day.” Eugenics, not surprisingly, targeted the traditional victims of racism-Jews,...