Abstract
Weber and Keynes were working on similar problems-the psychological and historical contexts of modern capitalism-although Weber concentrated on origins and Keynes on the contemporary period. Their premises and theoretical styles are quite similar and complementary, for the most part, but they differ on whether the investment decision is a rational act. This comparison has implications for the relation between sociology and economics, the relation of Keynes to the structure of social action, and the relation between macro and micro, particularly in regard to meaning