The UN Charter codifies the major principles of international relations, from sovereign equality of States to the prohibition of the use of force in international relations. The United Nations (UN) was the second multipurpose international organization established in the 20th century that was worldwide in scope and membership. Its predecessor, the League of Nations, was created by the Treaty of Versailles in 1919 and disbanded in 1946. The choice of the tenth UN Secretary-General, who will take office in January 2027, could shape global diplomacy, the response to crises across the world and the direction of the multilateral. The assembly passed a resolution supporting decision by the International Court of Justice, which said countries have an obligation under international law to reduce their greenhouse gas emissions. Together, we can make 2025 a new beginning “Even in the darkest days, I’ve seen hope power change”, declares the Secretary-General of the United Nations in his message to the world for 2025. Reflecting on the past year that brought “enormous pain, suffering and displacement”, António Guterres conveys a message of hope. Pledging “to stand with all those who are working to forge a. The General Assembly is the main deliberative, policymaking and representative organ of the UN. All 193 Member States of the UN are represented in the General Assembly, making it the only UN body with universal representation. Who will succeed António Guterres? Discover the candidates, selection process and what happens next in choosing the next United Nations Secretary-General in 2026. The UN comprises six principal organizations: General Assembly, Security Council, Economic and Social Council, International Court of Justice, Secretariat and Trusteeship Council which, together with several specialized agencies and related agencies, make up the UN System. Welcome to the United Nations, it's your world. The UN common system was established to prevent competition amongst organizations of the United Nations System for staff and to facilitate co-operation and exchange between organizations.