This Handbook offers a comprehensive examination of the peace, security, and development nexus from a global perspective, and investigates the interfaces of these issues in a context characterised by many new challenges.By bringing together more than 40 leading experts and commentators from across the world, the Handbook maps the various research agendas related to these three themes, taking stock of existing work and debates, while outlining areas for further engagement. In doing so, the chapters may serve as a primer for new researchers while also informing the wider scholarly community about the latest research trends and innovations. The volume is split into three thematic parts: Concepts and approaches New drivers of conflict, insecurity, and developmental challenges Actors, institutions, and processes. For ease of use and organisational consistency, each chapter provides readers with an overview of each research area, a review of the state of the literature, a summary of the major debates, and promising directions for future research.This Handbook will be of much interest to students of peace and conflict studies, development studies, security studies, and International Relations.