What is the primary purpose of the United Nations?

The primary purpose of the United Nations is to maintain peace and security among nations. Established in 1945 after World War II, the UN aims to prevent conflicts and foster cooperation between countries to ensure a stable and peaceful world. One of its main functions is to mediate disputes and provide a platform for dialogue and negotiation, thereby working to prevent wars and conflict escalation. Peacekeeping missions and the establishment of international laws and norms are key elements of the UN's role in promoting global stability.

While promoting international trade, establishing military alliances, and overseeing environmental policies are significant activities that the UN may engage in or support, they do not encapsulate the organization's foundational aim as clearly as maintaining peace and security does. The focus on peacekeeping and conflict resolution is central to the UN's identity and mission, making it the most defining characteristic of the organization.