Abstract : International organizations now serve a variety of functions in promoting peace and security, including mediating and resolving international crises. This essay explores how important international organizations—like the European Union, African Union, and United Nations—have changed in their roles in resolving international disputes. This study aims to comprehend the breadth and limitations of these groups in peace building by examining their frameworks, methods, and strategies as well as the impact of geopolitical issues. The study demonstrates through a number of case studies and theoretical insights that although international organizations can be useful venues for mediation, political dynamics, resource constraints, and state sovereignty frequently restrict their influence. Suggestions are made to improve the efficiency of international organizations in mediating disputes, emphasizing the value of flexibility, teamwork, and structural changes for enduring peace.