AS a sequel to his well-respected Affairs of State: Public Life in Late Nineteenth Century America (1977), Morton Keller has launched an even more ambitious three-volume study covering the first third of this century. The goal of these books is “to provide a comprehensive overview of the rich, complex setting of ideas, interests, and issues that gave shape to early twentieth-century American public policy.” The first two installments of Keller’s monumental project have now appeared, dealing in fairly rigidly separated compartments of economic policy and social policy. A third volume promises to examine the political, governmental, and legal structure within which these policy responses occurred.