The conception of politics as perpetual and peaceable warfare informs this study of power -- its psychological weapons and their interface. Drawing on examples from world history, Marshall shows that such concepts as equality, unity, and freedom have been used to replace physical force in contemporary conflicts. Particularly apt is his comparison of "absolute sovereignty" and the Marxian "withering away" of the state -- both used to uphold tyranny. This is a synthetic study, and the text is spattered with citations of Morgenthau, Boulding and Fulbright. The book is a revision of the 1939 edition, published by Oxford University Press, and it takes into account more recent studies in political science and history. Like his recent Law and Psychology in Psychology in Conflict (1966), it is directed to a very special, informed audience.