Contributors Slavoj Zizek, Alain Badiou, Antoni Negri, Michael Hardt, Jacques Rancière, Terry Eagleton, Jean-Luc Nancy, Susan Buck-Morss, Bruno Bosteels, Peter Hallward, Alberto Toscano, Wang Hui and others took part in a landmark conference in London on the idea of communism in 2009. This volume brings together their discussions on the philosophical and political import of the communist idea, highlighting both its continuing significance and the need to reconfigure the concept within a world marked by havoc and crisis.