How are group-based identities related to intergroup conflict? When and how do ethnic, religious, and national identities lead to oppression, violence, rebellion, war, mass-murder, and genocide? How do intergroup conflicts change people's identities? How might social identity be harnessed in the service of reducing conflict between groups? The chapters in this book present a sophisticated and detailed interdisciplinary analysis of the most topical and fundamentalissues involved in understanding identity and conflict.