There has now been more than a decade of conceptual work, policy development and operational activity in the field of security sector reform (SSR). To what extent has its original aim to support and facilitate development been met? The different contributions to this volume address this question, offering a range of insights on the theoretical and practical relevance of the security-development nexus in SSR. They examine claims of how and whether SSR effectively contributes to achieving both security and development objectives. In particular, the analyses presented in this volume provide a salutary lesson that development and security communities need to take each other’s concerns into account when planning, implementing and evaluating their activities. The book offers academics, policy-makers and practitioners within the development and security communities relevant lessons, suggestions and practical advice for approaching SSR as an instrument that serves both security and development objectives.