This volume brings together perspectives on social identity and peace psychology to explore the role that categorization plays in both conflict and peace-building. To do so, it draws leading scholars from across the world in a comprehensive exploration of social identity theory and its application to some of the world s most pressing problems, such as intrastate conflict, uprising in the middle east, the refugee crisis, global warming, racism and peace building. A crucial theme of the volume is that social identity theory affects all of us, no matter whether we are currently in a state of...