In this newly second edition, Thomas H. Greene traces the causes and characteristics of a wide range of revolutionary movements, with a view to integrating propositions and hypotheses about the revolutionary process into one or several theories of revolution. Among the many new and revised features this edition: (1) Concludes Chapters 4 to 12 with a list of major propositions and hypotheses that have been tested in the chapters. (2) Summaries in Chapter 4 to 12 major characteristic of the revolutionary process in terms of the movement (leaders, followers, ideology, organization, techniques, external support) and the causes (classified as accelerators" and "preconditions")."