Аннотация
This paper critically examines the United Nations (UN) as a global institution for conflict resolution, tracing its evolution from a post-World War II security framework to a complex multilateral body confronting twenty-first-century challenges. Through a systematic analysis of historical and contemporary case studies, the paper evaluates the mechanisms through which the UN engages in peacekeeping, mediation, and preventive diplomacy. It identifies notable successes, including the stabilization of Namibia, Cambodia, and Sierra Leone, alongside stark failures, such as the genocide in Rwanda and the protracted conflicts in Syria and Yemen. The study argues that while the UN has made indispensable contributions to international peace and security, persistent structural deficiencies, particularly the veto power of the five permanent Security Council members, chronic underfunding, and the subordination of UN authority to the sovereign interests of powerful states, continue to undermine its effectiveness. The paper concludes with recommendations for institutional reform to enhance the UN's conflict resolution capacity in an increasingly multipolar world.