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This book presents empirical research on the nature and structure of political violence. While most studies of social movements focus on single - nations, Donatella della Porta uses a comparative research design to analyse movements in two countries - Italy and Germany - from the 1960s to the 1990s. Through extensive usage of official documents and in-depth interviews, della Porta is able to explain the actors' construction of external political reality. The empirical data are used to build a middle-range theory of political violence that incorporates an analysis of the interactions between social movements and the state at the macro-level, an analysis of the development of radical organizations as entrepreneurs for political violence at the meso-level, and an analysis of the construction of 'militant' identities and countercultures at the micro-level.

This article focuses on the use of Computer-Mediated Communication by the movement for global justice, with special attention to the organisations involved in the movement and its activists. We examined data collected during two supranational protest events: the anti-G8 protest in Genoa in July 2001 and the European Social Forum (ESF) in Florence in November 2002. In both cases, we have complemented an analysis of the Genoa Social Forum and ESF websites with a survey of activists, including questions about their use of the Internet. We then examine hypotheses about changes new technologies introduce in collective action. The Internet empowers social movements in: (a) purely instrumental ways (an additional logistical resource for ‘resource-poor’ actors), (b) a protest function (direct expression of protest); (c) symbolically (as a medium favouring identification processes in collective actors) and (d) cognitively (informing and sensitising public opinion).

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