What role does the united nations on the world stage?

The main function of the United Nations is to preserve international peace and security. Chapter 6 of the Charter provides for the pacific settlement of disputes, through the intervention of the Security Council, by means such as negotiation, mediation, arbitration, and judicial decisions. The Security Council may investigate any dispute or situation to determine whether it is likely to endanger international peace and security. At any stage of the dispute, the council may recommend appropriate procedures or methods of adjustment, and, if the parties fail to settle the dispute by peaceful means, the council may recommend terms of settlement.