This title was first published in 2000. Drawing upon fieldwork conducted with Amnesty International, the Labour Party, Tenants' Associations and the Exodus collective, this work examines the nature of political activism. The author combines Habermasian theory and empirical fieldwork to critically analyze the nature of the political public sphere. While adopting a Habermasian approach, Clark recognizes the problems and limitations associated with notions of civil society and communicative action. An empirically formed critical stance is maintained throughout the work. Three main themes are drawn from this research: an analysis of structures of political participation; presentation of a typology of political activism ; analysis of the public process of participation. Essential reading for those studying public participation and its relationship to activism, as well as for students of politics, public policy and sociology.