The role of the United Nations in promoting global peace and security involves facilitating international cooperation and conflict resolution among member states. The UN provides a platform for diplomatic dialogue and negotiation, often deploying peacekeeping missions to mitigate conflicts. Through agencies like the Security Council and the General Assembly, the UN addresses issues ranging from humanitarian crises to disarmament, promoting norms of international law and human rights. The organization seeks to prevent warfare and establish frameworks for sustainable peace, although it faces challenges including geopolitical tensions and resource limitations.