Abstract
Franz Boas is among the most important public intellectuals in American history because the authority of his expertise was joined with the purposes to which he applied his citizenship. His contributions to the discipline of anthropology were as towering as anyone has ever made; he also tapped his scholarly credentials to fight for good causes, such as civil rights and civil liberties. His origins as a Jewish immigrant and his political ideals as a cosmopolitan liberal predisposed him to reject the racialism that dominated late-nineteenth-century thought, and to advance an alternative social science that would be unpolluted by condescension towards lesser breeds. So persuasive was his research that a paradigm shift occurred; and buttressed with the authority of scholarship, Boas was decisive in changing public discourse on the often radioactive subject of race. He honored the ideal of the scholar as activist and as social conscience, and virtually no one in modern American history came closer to satisfying that standard.