Joel Isaac’s Working Knowledge is intellectual history at its best. Isaac’s subject is the development of several of the human sciences (psychology, sociology, anthropology, history of science) at Harvard University between 1920 and 1960. But as Isaac makes clear, this is more than a story of disciplinary expansion; as the social sciences took root at America’s most prestigious university, so did a distinctive view of the epistemological underpinnings of social-scientific inquiry. Given both the centrality of Harvard in the twentieth-century academic world and the importance of many of the figures at the center of this shift—James Bryant Conant, Thomas Kuhn, Talcott Parsons, W. V. Quine, and B. F. Skinner, among others—Working Knowledge is a local study of broad implication and interest.