In this important book, Antonio Negri develops the key ideas that were to form the basis for the highly influential analyses of new forms of power and social struggle presented in Empire and Multitude. He shows how new technology and the break-up of the traditional factory have created new social subjects whose value is no longer tied to their skill. The spread of communication networks and the globalization of production mean that capitalism has become totalized – but not, Negri stresses, monolithic. On the contrary, the possibilities for subversion have correspondingly increased. Going beyond classical Marxism, he shows how old solidarities must be reformulated and new alliances created. The struggles which marked the political end of the twentieth century are now being repeated in a new historical conjuncture, giving rise to new forms of transnational solidarity that can challenge dominant global powers. This new paperback edition, which includes a new Preface by the author, is an excellent introduction to the work of one of the most influential political thinkers writing today and will be essential reading for anyone who wishes to understand the new forms of conflict and struggle that will shape the world in the twenty-first century.