This book aims to revisit the interdisciplinary roots of social movement studies. Each discipline raises its own questions and approaches the subject from a different angle or perspective. The chapters of this handbook are written by internationally renowned scholars representing the various disciplines involved. They each review the approach their sector has developed and discuss their disciplines' contributions and insights to the knowledge of social movements. Furthermore, each chapter addresses the "unanswered questions" and discusses the overlaps with other fields as well as reviewing the interdisciplinary advances so far.