“Group Peace Work” explores why some multilateral peace negotiations, particularly those facilitated by the United Nations, succeed while others fail. This book leverages decades of UN peacekeeping mission reports to dissect the anatomy of successful peace processes, focusing on the critical roles of inclusivity, sustained commitment from international actors, and addressing the root causes of conflict. It challenges traditional top-down peacemaking approaches by highlighting the need for holistic strategies that incorporate diverse stakeholders. The book argues that successful negotiations are not solely determined by high-level agreements but arise from carefully orchestrated efforts. For instance, ensuring inclusivity by representing marginalized groups can significantly boost the legitimacy and durability of peace agreements. The book methodically progresses across chapters, first establishing a theoretical framework, then dedicating sections to inclusivity, sustained commitment, and addressing root causes, using case studies of UN missions to highlight successful strategies and common pitfalls.