The United Nations (UN) plays a central role in maintaining international peace and security by preventing conflicts, mediating disputes, and deploying peacekeeping missions. Through its Security Council, the UN authorizes actions such as sanctions, ceasefires, or peacekeeping operations to manage threats to global stability. The UN also promotes dialogue, diplomacy, and conflict resolution through special envoys and international negotiations. Additionally, it supports post-conflict reconstruction and humanitarian assistance, helping countries recover and prevent future violence. Overall, the UN acts as a global platform for cooperation among nations.