United Nations
Overview
The United Nations (UN) is the world's largest universal international organization, created in 1945 to prevent a repetition of the devastation of World War II. Its purposes are to maintain international peace and security, promote friendly relations among nations, and achieve international cooperation on economic, social, cultural, and humanitarian issues. As of 2024, it has 193 member states and 2 observer states (the Vatican and Palestine); its headquarters is in New York, United States, with major offices in Geneva, Switzerland, Vienna, Austria, and Nairobi, Kenya.
Key Details
Founding Background and History
The League of Nations, established after World War I, effectively failed due to its lack of enforcement power and the withdrawal of major powers. During World War II, the Atlantic Charter of 1941 and the Declaration by United Nations of 1942 led to the concretization of an organizational plan at the Dumbarton Oaks Conference in 1944, and from April to June 1945, representatives of 50 countries adopted the UN Charter at the San Francisco Conference. The Charter entered into force on October 24, 1945, and in commemoration of that day, October 24 is designated each year as United Nations Day. Membership, which stood at 51 countries at its founding, grew rapidly after decolonization and the end of the Cold War, and with South Sudan's accession in 2011, the current system of 193 states was completed.
Organizational Structure
The UN's principal organs are six in number: the General Assembly, the Security Council, the Economic and Social Council (ECOSOC), the Trusteeship Council, the International Court of Justice (ICJ), and the Secretariat. The General Assembly is the largest deliberative body, in which every member state holds one vote, and the Security Council bears primary responsibility for international peace and security. The Security Council is composed of five permanent members (the United States, the United Kingdom, France, Russia, and China) and ten non-permanent members, and the permanent members may exercise a veto on substantive matters. The International Court of Justice is located in The Hague, Netherlands, and the Secretariat is headed by the Secretary-General.
Peacekeeping Operations (PKO)
UN peacekeeping operations are a representative activity in which soldiers, police, and civilian personnel are dispatched to conflict zones to monitor ceasefires, maintain public order, support elections, and provide humanitarian assistance. Beginning with the Middle East observer mission in 1948, dozens of missions have been carried out, including the dispatch of UN forces during the Korean War in 1950, and missions in the Congo, Cyprus, East Timor, and South Sudan. During the Cold War, its functions were constrained by confrontation among the great powers, but since the 1990s, as conflicts became more intrastate and complex, the proportion of civilian police and administrative personnel has grown.
Major Specialized Agencies and Cooperation System
Under the UN are the World Health Organization (WHO), the United Nations Educational, Scientific and Cultural Organization (UNESCO), the United Nations Children's Fund (UNICEF), the United Nations High Commissioner for Refugees (UNHCR), the International Labour Organization (ILO), the Food and Agriculture Organization (FAO), and the World Food Programme (WFP). The International Monetary Fund (IMF), the World Bank, and the World Trade Organization (WTO) are UN specialized agencies or related organizations responsible for the international economic order. The International Atomic Energy Agency (IAEA) is an independent intergovernmental organization under the UN General Assembly, tasked with nuclear non-proliferation and nuclear safety.
Finances and the Secretary-General
The UN is financed by assessed contributions from member states and voluntary contributions. The regular budget is covered by assessment rates reflecting each country's national income and other factors, while the peacekeeping budget is calculated separately. The Secretary-General is appointed by the General Assembly, serves a five-year term that may be renewed, and to date Trygve Lie, Dag Hammarskjöld, U Thant, Kurt Waldheim, Javier Pérez de Cuéllar, Boutros Boutros-Ghali, Kofi Annan, Ban Ki-moon, and António Guterres have held the office.
Latest Trends
In September 2024, the Summit of the Future was held at UN Headquarters in New York, where the Pact for the Future, the Global Digital Compact, and the Declaration on Future Generations were adopted. This was a comprehensive agreement encompassing artificial intelligence governance, climate response, conflict prevention, and reform of the international financial system, and in particular, discussions on establishing international norms for the military use of AI and information manipulation were set in motion in earnest. Discussions on reforming the Security Council are also ongoing. The G4 (Japan, Germany, India, and Brazil) and the African Union demand an expansion of permanent membership, while some countries insist on restricting the veto and strengthening regional representation, leaving positions divided.
The war in Ukraine since 2022 and the Gaza Strip conflict of 2023–2025 starkly exposed the deadlock in the Security Council. As the adoption of resolutions was repeatedly thwarted by vetoes cast by permanent members, international skepticism about the UN's ability to resolve conflicts grew. In 2022, the General Assembly adopted a resolution imposing an obligation to explain before the General Assembly when a veto is cast, and in 2024, the Pact for the Future included a provision to review the legitimacy of veto use. Meanwhile, marking its 80th anniversary in 2025, the UN is pursuing 'UN80,' an initiative to accelerate reform, promoting efficiency in organizational operations and securing fiscal soundness.
In the climate field, debate continues over the implementation of the Paris Agreement and the climate finance agreement at COP29 (a target of $300 billion per year), and the Sustainable Development Goals (SDGs) are assessed as falling far short of achievement ahead of the 2030 deadline. Concerns over reduced financial contributions from major assessed contributors such as the United States, a skeptical trend toward multilateralism, and the expanding voice of the Global South are cited as key variables surrounding the UN in 2024–2025. South Korea joined simultaneously with North Korea in 1991, produced Secretary-General Ban Ki-moon in 2007–2016, and served as a non-permanent member of the Security Council in 2024–2025, establishing itself as a major player in multilateral diplomacy.
Related Topics
- [[United Nations Security Council]]
- [[UN Charter]]
- [[Peacekeeping Operations]]
- [[World Health Organization]]
- [[Sustainable Development Goals]]
- [[Ban Ki-moon]]
- [[António Guterres]]
- [[International Court of Justice]]