Alan Gewirth was a twentieth-century moral philosopher best known for his attempt to complete the Kantian project and show that rationality requires morality. Gewirth took his BA at Columbia University in 1934, studying with John Herman Randall and Richard McKeon. After two years of graduate study at Columbia, he spend the academic year 1936–1937 on a Sage Fellowship at Cornell University and then followed McKeon to the University of Chicago as his research and teaching assistant. In June 1942 Gewirth was drafted into the army, and, without seeing combat, moved up the ranks from private to captain in four years. After World War II, he returned to Columbia and received his PhD in philosophy in 1948. From 1947 on, he was a regular member of the faculty at the University of Chicago, eventually becoming the Edward Carson Waller Distinguished Service Professor in the Philosophy Department in a career that...