How does IR theory explain the contribution of the United Nations to the maintenance of international peace and security? “More than ever in human history, we share a common destiny. We can only master it if we face it together. And that's why we have the United Nations." (Annan: 2001) It is generally believed that international organizations must assume responsibility for maintaining global stability and peace, be it social, financial or diplomatic; they must also act for the benefit of international society. The United Nations was created on the principle of supporting and maintaining international peace and security, which combines many responsibilities to re-imagine the world in a new and reasonable way. Tim Dunne describes the United Nations as “a multipurpose agency directed at specific objectives including collective security, peacekeeping, health, the environment and human rights” (Dunne, 2007, p.103). Given that the UN is a 'multipurpose' organisation, it would be inappropriate to explain its contribution to the international scene as centered on a specific objective; therefore this article will present a description of the United Nations and its activities, followed by an empirical assessment of realism in UN peacekeeping. The final section will describe a perspective of IR theory that is relevant to the role of the United Nations in maintaining peace and security. The activities of the United Nations for peace and security have risen to an unmistakable quality as instruments of international activity thanks to the promise of the formation of extra-impartial organizations. world. After its inception in 1945, the UN embraced the idea of ​​collective security, played an important role in decolonization, and initiated a series of activities such as peacekeeping, peacemaking, enf...... middle of paper ......ing conflict resolution model. The final method by which IR describes the UN's contribution to peace is as a perception of humanitarian intervention. Along with the Responsibility to Protect proposition, the perception of humanitarian intervention is one segment of a broad collection of conflict management principles and tools that have helped make the world a better place. These patterns have caused the decline of mass atrocities, wars, genocides and armed conflicts (Western, 2011). As established in this document, the topic “How IR explains the UN's contribution to peace and security” has a range of views and interpretations subject to the school of thought being pursued. IR theory is a significant field in understanding international issues that specifically reduce the prospects of war; significantly this theory has grown to become a fundamental aspect of the United Nations.