'Our wisest guide to social movements has done it again: produced the best book on the topic, now completely updated to encompass the Arab Spring, Black Lives Matter and so much more. Tarrow shows us how social movements have expanded their repertoires in the 21st century, the opportunities (and threats) posed by social media, and how social protests have interlinked with political parties, pushed countries to revolution, and sought to usher in democracy. Tarrow shows us not only how much the world has changed in the last decade, but how and why.' Jack A. Goldstone, Professor of Public Policy, George Mason University'This 4th edition of Power in Movement delivers everything we've come to expect from Tarrow and even more. Fully updated to include contemporary events and new scholarship, Power in Movement is comprehensive and gracefully written. It will intrigue and entertain readers new to the field of contentious politics and will be indispensable for scholars.' David S. Meyer, Professor of Sociology, Political Science, and Planning, Policy, and Design, University of California, Irvine'In times of multiple crises, this reflecting on the power of social movements-both the progressive and the regressive ones-is all the more relevant. This deeply revised edition of one of the most influential texts in the growing field of contentious politics contributes to and further expands our knowledge on the central topics of democratization and revolution as well as on the hybridization between party politics and social movements.' Donatella della Porta, Professor of Political Science, Director, The Center on Social Movement Studies (Cosmos), Scuola Normale Superiore'Taking account of the momentous developments in social movements that have occurred during the past decade, the new edition of Sidney Tarrow's classic text offers fresh insights on the exalted and perilous nature of contentious politics. With a rare combination of theoretical depth, rich historical narrative, and engaging prose, Power in Movement stimulates research questions for scholars, provides students with a resonant and comprehensive guide to social and political activism, and urges citizens' attention to the growing importance of social movements in determining the fate of democracy in the United States and the world.' Sidney M. Milkis, White Burkett Miller Professor, University of Virginia Sidney Tarrow is the Emeritus Maxwell M. Upson Professor of Government at Cornell University and Adjunct Professor at the Cornell Law School. Some of his recent publications include Strangers at the Gates (2012), The Language of Contention (2013), War, States, and Contention (2015), and Movements and Parties: Critical Connections in American Political Development (2021).