This book presents an analysis and description of the twentieth-century form of dictatorship, the ideological one-party state, largely through sixteen case-studies of notable or representative examples. Part One presents examples of the party type (the party-state regime), Part Two examples of the military type (the military-party regime) and Part Three examples of transformations from one type to the other. These case-studies are drawn from fascist, communist, and Third World examples and from the 1920s to the 1980s.