Book excerpt: This encyclopaedia provides a comprehensive overview of major theories and approaches to the study of peace and conflict across different humanities and social sciences disciplines. Peace and conflict studies (PCS) is one of the major sub-disciplines of international studies (including political science and international relations), and has emerged from a need to understand war, related systems and concepts and how to respond to it afterward. As a living reference work, easily discoverable and searchable, the Palgrave Encyclopedia of Peace and Conflict Studies offers solid material for understanding the foundational, historical, and contemporary themes, concepts, theories, events, organisations, and frameworks concerning peace, conflict, security, rights, institutions and development. The Palgrave Encyclopaedia of Peace and Conflict Studies brings together leading and emerging scholars from different disciplines to provide the most comprehensive and up-to-date resource on peace and conflict studies ever produced.