For about 12 weeks, we will read and assess major works by Tilly, including recent books—Why? (2006), Democracy (2007), Trust and Rule (2005), Contentious Politics (2007), Regimes and Repertoires (2006), Social Movements (2004), Contention and Democracy in Europe, 1650-2000 (2004), The Politics of Collective Violence (2003)—and major earlier statements such as From Mobilization to Revolution; Big Structures, Large Processes, Huge Comparisons; Coercion, Capital, and European States, A.D. 990-1992; European Revolutions; Durable Inequality; Dynamics of Contention (with McAdam and Tarrow). We will also read a few essays published in academic journals. During the last part of the term, the seminar probes contemporary processes of large-scale social change, relying heavily on works inspired in the Tillian perspective and research by students. We expect some guest speakers, including Charles Tilly himself. We will also consider works by close associates such as Tarrow's Transnational Activism and the growing literature on transnational or global collective action.