What is one of the main purposes of the United Nations?

The main purpose of the United Nations is to develop friendly relations among countries. This is rooted in the UN's founding principles, which emphasize the importance of fostering peace, security, and cooperation in international relations. Through various programs and initiatives, the UN works to promote dialogue and understanding among member states, aiming to resolve conflicts peacefully and enhance relationships that can lead to collaboration on global issues.

When countries engage in friendly relations, it can lead to better cooperation on matters such as development, human rights, and humanitarian efforts, strengthening political and social ties globally. This mission aligns with the UN Charter's commitment to maintaining international peace and security while promoting social progress and better living standards.

In contrast, the other options do not encapsulate the primary objectives of the United Nations. Promoting global trading laws is primarily the focus of organizations like the World Trade Organization; controlling financial markets falls under the jurisdiction of national and international financial institutions; and creating new national governments does not align with the UN’s role, which is more about supporting existing nations and facilitating diplomacy rather than instituting new governments.