This book fuses two key concerns of contemporary sociology: globalization and its discontents, and the 'complexity turn' in social theory. Authors utilize complexity theory to analyze the shifting constellation of social movement networks that constitute opposition to neo-liberal globalization. They explore how seemingly chaotic and highly differentiated social actors interacting globally through computer mediated communications, face to face gatherings and protests constitute a 'multitude' not easily grasped through established models of social and political change. Drawing upon extensive empirical research and utilising concepts drawn from the natural and social sciences this book suggests a framework for understanding mobilisation, identity formation and information flows in global social movements operating within complex societies. It suggests that this 'movement of movements' exhibits an emergent order on the edge of chaos, a turbulence that is recasting political agency in the 21st century.