What Is the United Nations and How It Actually Works

Why the United Nations Exists

The United Nations (UN) is an international organization founded on October 24, 1945, in the aftermath of World War II, with the primary mission of maintaining international peace and security, promoting human rights, fostering social and economic development, and providing a forum for dialogue among nations. It was created to replace the failed League of Nations, which had been unable to prevent the catastrophe of a second world war, and its founding charter reflects the determination of its creators that never again should humanity endure such destruction.

The UN was established by 51 founding member states. Today, it has 193 member states, encompassing virtually every recognized country in the world. Its headquarters is in New York City, with major offices in Geneva, Vienna, and Nairobi. The organization operates on a budget funded by member state contributions, with the United States, China, Japan, Germany, and the United Kingdom as the largest contributors.

The Six Principal Organs

The UN Charter establishes six principal organs, each with distinct functions and responsibilities:

• General Assembly: The main deliberative body, where all 193 member states have equal representation and one vote each. The General Assembly discusses international issues, adopts resolutions, approves the budget, and elects members to other UN bodies. However, its resolutions are generally non-binding, serving as recommendations rather than enforceable decisions.
• Security Council: The most powerful UN body, charged with maintaining international peace and security. It has 15 members: five permanent members (the P5: the United States, United Kingdom, France, Russia, and China) and ten non-permanent members elected for two-year terms. The Security Council can authorize military action, impose sanctions, and establish peacekeeping operations. Its decisions are binding on all UN member states.
• Secretariat: The administrative arm of the UN, headed by the Secretary-General, who serves as the organization's chief administrative officer and chief diplomat. The Secretary-General is appointed by the General Assembly on the recommendation of the Security Council for a renewable five-year term.
• International Court of Justice (ICJ): The principal judicial organ, located in The Hague, Netherlands. It settles legal disputes between states and provides advisory opinions on legal questions referred by UN agencies. Only states, not individuals or organizations, can be parties to cases before the ICJ.
• Economic and Social Council (ECOSOC): Coordinates the economic, social, and environmental work of the UN and its specialized agencies. It oversees 14 specialized agencies and numerous programs and funds.
• Trusteeship Council: Originally established to oversee the administration of trust territories transitioning to independence. It suspended operations in 1994 after the last trust territory, Palau, gained independence.

The Security Council and the Veto Power

The Security Council is the organ that most directly affects global peace and security, and its structure reflects the power dynamics of the post-World War II world. The five permanent members each possess veto power, meaning any one of them can block any substantive resolution regardless of the votes of the other 14 members. This power was built into the UN Charter to ensure that the major powers would participate in the organization, since the League of Nations had failed partly because major powers left or refused to join.

The veto has been used hundreds of times since 1945. Russia (and the former Soviet Union) has used it most frequently, followed by the United States. The veto has been both praised as a necessary safeguard that prevents the UN from taking actions that major powers would resist by force, and criticized as an unjust mechanism that allows powerful nations to shield themselves and their allies from accountability.

Notable consequences of the veto include:

• The inability to authorize intervention in numerous conflicts where a permanent member has a strategic interest, including the Syrian civil war, where Russia and China repeatedly vetoed resolutions targeting the Assad government.
• The inability to reform the Security Council itself, since any change to the charter requires the approval of all five permanent members.
• The development of the Uniting for Peace resolution (1950), which allows the General Assembly to recommend collective action when the Security Council is deadlocked by a veto, though such recommendations remain non-binding.

Peacekeeping Operations

UN peacekeeping is one of the organization's most visible and important activities, even though the word peacekeeping does not appear in the original UN Charter. The first peacekeeping mission was deployed in 1948 to monitor the ceasefire in the Arab-Israeli conflict, and since then, the UN has conducted over 70 peacekeeping operations worldwide.

Modern peacekeeping operations typically involve:

• Military personnel: Troops contributed by member states, known as Blue Helmets for their distinctive headgear, who monitor ceasefires, protect civilians, and provide security.
• Police officers: Civilian police who help maintain law and order, train local police forces, and support rule-of-law institutions.
• Civilian specialists: Experts in human rights, elections, disarmament, public information, and civil affairs.

As of recent years, approximately 90,000 uniformed and civilian personnel serve in UN peacekeeping operations across multiple countries. The largest contributors of troops are developing nations including Bangladesh, Nepal, India, Rwanda, and Ethiopia, while the largest financial contributors are developed nations including the United States, China, Japan, and European countries.

Peacekeeping has achieved notable successes, including helping stabilize Mozambique, East Timor, and Sierra Leone after civil wars. However, it has also faced significant failures, most devastatingly in Rwanda (1994), where a small and poorly equipped force was unable to prevent the genocide that killed approximately 800,000 people, and in Srebrenica, Bosnia (1995), where UN peacekeepers failed to protect thousands of Bosnian Muslims from massacre.

Specialized Agencies and Programs

The UN system extends far beyond its six principal organs. A network of specialized agencies, funds, and programs addresses issues ranging from health to aviation to labor rights:

• World Health Organization (WHO): Directs international health policy, coordinates responses to pandemics, and sets global health standards. Its role became especially prominent during the COVID-19 pandemic.
• UNICEF: Provides humanitarian aid to children worldwide, focusing on nutrition, education, immunization, and emergency relief. It operates in over 190 countries.
• UNESCO: Promotes education, science, culture, and communication. It designates World Heritage Sites and works to preserve cultural and natural heritage.
• UNHCR: The UN Refugee Agency protects refugees and displaced people, providing shelter, food, and legal assistance. It currently assists tens of millions of displaced individuals worldwide.
• World Food Programme (WFP): The largest humanitarian organization addressing hunger, providing food assistance to approximately 160 million people annually. It was awarded the Nobel Peace Prize in 2020.

These agencies often operate with greater effectiveness than the more politically constrained principal organs, delivering tangible humanitarian, health, and development outcomes in communities around the world.

Criticisms and Calls for Reform

The United Nations faces persistent criticism from multiple directions:

• Security Council reform: The P5 structure reflects 1945 power dynamics, not today's world. Countries like India, Brazil, Germany, and Japan argue for permanent seats, while Africa has no permanent representation. However, reform requires charter amendment, which the current P5 can veto.
• Effectiveness: Critics argue the UN is too slow, too bureaucratic, and too constrained by member state sovereignty to address urgent crises effectively. The organization's consensus-driven decision-making can result in watered-down resolutions that fail to address the root causes of conflicts.
• Accountability: UN peacekeepers have been implicated in sexual exploitation and abuse scandals in multiple missions, and accountability mechanisms have been criticized as inadequate.
• Funding: The UN depends on member state contributions, and several major contributors, including the United States at various times, have withheld or delayed payments, creating chronic funding shortfalls.

Despite these criticisms, the UN remains the only truly global forum for international cooperation. Its defenders argue that without the UN, the world would lack even the imperfect mechanisms for dialogue, norm-setting, and collective action that currently exist. The organization's value lies not only in what it achieves but in the alternative it provides to unilateral action and conflict in a world of competing national interests.