“…Although incomplete, Tilly's work bequeaths a powerful set of tools to social scientists who are concerned with explaining social processes through sustained research and not through speculation. 4 A very incomplete accounting of the ongoing conversations among Tilly's former students and colleagues would include efforts to build more explicit foundations for mechanismbased explanations (Demetriou 2009(Demetriou , 2012; extend Tilly's later work back into his early interest in urbanization (e.g., Hanagan & Tilly 2011); join Tilly's network-sensitive later work with more closely ethnographic studies of protest (e.g., Auyero & Moran 2007, Wood 2012; deepen the cultural aspects of Tilly's analysis of mechanisms and repertoires (Demetriou 2007, Fukase-Indergaard & Indergaard 2008; expand on the links between contention and states, regimes, and repertoires (e.g., Tarrow 2012); develop new measures of repertoires and their diffusion (e.g., Wada 2012); apply Tilly's Durable Inequality to comparative immigration (Poros 2011); explore the link between narrative and boundaries (Smith 2004); and, as here, link Tilly's developing theories of social action to his broader analysis of political contention (Goldstone 2010). 5 For a detailed discussion of Tilly's legacy, see the special issue of the American Sociologist coedited by Koller & Nichols (2010).…”