Revolutions, social movements, religious and ethnic conflict, nationalism and civil rights, and transnational movements: these forms of contentious politics combine in Charles Tilly's and Sidney Tarrow's Contentious Politics. The book presents a set of analytical tools and procedures for study, comparison, and explanation of these very different sorts of contention. Drawing on many historical and contemporary cases, the book shows that similar principles describe and explain a wide variety of struggles as well as many more routine forms of politics. Tilly and Tarrow have written the book to introduce readers to an exciting new program of political and sociological analysis.