Composing Peace: Mission Composition in UN Peacekeeping is about mission composition in peacekeeping operations and asks how diversity of mission composition influences the ability of a peace mission to keep the peace. This book focuses on four types of mission composition—diversity among peacekeepers, within the mission leadership, between mission leaders and peacekeepers, and between peacekeepers and locals. It is the first book to explore mission composition and its consequences, unpacking a concept hitherto unexplored and empirically combining quantitative and qualitative methods. It makes an important contribution to the fields of peace research, security studies, and international relations at large.