The Structure and Function of the United Nations

The United Nations is the largest and most influential intergovernmental organisation in the world, with 193 member states working together on issues that range from war and peace to climate change and child welfare. But how does an organisation this vast actually function? The answer lies in its carefully designed architecture. The UN is built around six principal organs, each with a distinct role, supported by a wide network of funds, programmes, and specialised agencies. Understanding this structure is the key to understanding how global cooperation works in practice.

The foundation: six principal organs 🔗

When the UN Charter was signed in 1945, it established six main organs to carry out the organisation’s work. These are the General Assembly, the Security Council, the Economic and Social Council (ECOSOC), the International Court of Justice, the Secretariat, and the Trusteeship Council. Five of these are based at the UN headquarters in New York, while the International Court of Justice sits in The Hague, Netherlands. Each organ handles a specific dimension of the UN’s mandate, and together they form the backbone of the entire system.

The General Assembly 🔗

The General Assembly is the main deliberative, policymaking, and representative organ of the UN. It is the only body where all 193 member states are represented, and every country, regardless of size or power, holds a single vote. This principle of one-state-one-vote makes it the most democratic part of the UN system.

The Assembly meets in regular session every year, beginning in September, when heads of state and government gather in New York for the famous general debate. Decisions on ordinary matters are taken by a simple majority, but important questions, such as those on peace and security, the admission of new members, and budgetary matters, require a two-thirds majority. The Assembly distributes much of its detailed work across six main committees that cover areas like disarmament, economic and financial affairs, social and humanitarian issues, and legal matters. Crucially, it also elects the non-permanent members of the Security Council, appoints the Secretary-General on the Council’s recommendation, and approves the UN budget.

The Security Council 🔗

If the General Assembly is the voice of the membership, the Security Council is the organ with real enforcement power. The UN Charter gives it primary responsibility for maintaining international peace and security. Its decisions are binding on all member states, a power that no other UN organ holds.

The Council has 15 members. Ten are non-permanent members elected by the General Assembly for two-year terms. The other five are the permanent members, often called the P5: China, France, Russia, the United Kingdom, and the United States. These five were granted permanent seats because of their roles in establishing the UN after the Second World War. For a substantive resolution to pass, it needs nine affirmative votes with no veto from any permanent member.

The veto and the question of reform 🔗

The veto is the most powerful and most debated feature of the UN. When any one of the P5 casts a negative vote on a substantive resolution, that resolution fails, no matter how many other members support it. This design was meant to ensure that the major powers would always remain engaged with the UN rather than abandoning it, as had happened with the League of Nations. In practice, though, the veto has frequently blocked Council action on major crises, drawing criticism that it lets a handful of states paralyse the world’s premier security body.

This is a topic of direct relevance here. India, as one of the world’s largest democracies and a major contributor to UN peacekeeping operations, has long argued that the current structure reflects the world of 1945 rather than today’s realities. India is a leading voice in the campaign for Security Council reform and an expanded permanent membership that would better represent the Global South.

The Economic and Social Council (ECOSOC) 🔗

The Economic and Social Council coordinates the economic, social, and environmental work of the UN. It serves as the central platform for debate and policy review on sustainable development, and it links the principal organs with the broader UN system. One of ECOSOC’s defining tasks is coordinating the work of the specialised agencies and consulting with thousands of non-governmental organisations that hold consultative status with it. In an era dominated by goals like the Sustainable Development Goals, ECOSOC has become the engine room for much of the UN’s development agenda.

The International Court of Justice 🔗

The International Court of Justice is the principal judicial organ of the UN and the only one of the six organs not located in New York. It sits at the Peace Palace in The Hague. The Court has two main functions. First, it settles legal disputes submitted to it by states in accordance with international law. Second, it gives advisory opinions on legal questions referred to it by authorised UN organs and specialised agencies. The Court is composed of 15 judges elected to nine-year terms by both the General Assembly and the Security Council, with no two judges from the same country serving at the same time.

The Secretariat 🔗

The Secretariat carries out the day-to-day work of the UN. It is made up of the Secretary-General and tens of thousands of international staff stationed in offices around the world. The Secretary-General is the chief administrative officer of the organisation, appointed by the General Assembly on the recommendation of the Security Council for a five-year, renewable term. The Secretariat services the other organs, administers their programmes and policies, and gives the Secretary-General the authority to bring matters that threaten international peace to the attention of the Security Council.

The Trusteeship Council 🔗

The Trusteeship Council is the one organ that no longer actively operates. It was created to supervise the administration of trust territories and guide them towards self-government or independence. It played a significant role in decolonisation, but once the last trust territory, Palau, became independent in 1994, the Council suspended its operations. It still exists on paper because it cannot be formally dissolved without amending the UN Charter, a reminder of how the UN’s structure carries the imprint of the era in which it was born.

Beyond the six organs: the wider UN system 🔗

The six principal organs are only the visible core. Most of the UN’s well-known work on the ground is actually carried out by a much larger family of entities. These broadly fall into two categories: funds and programmes, and specialised agencies.

Funds and programmes 🔗

Funds and programmes are subsidiary bodies of the General Assembly, established by Assembly resolutions to tackle specific humanitarian and development concerns. They are funded almost entirely through voluntary contributions rather than mandatory dues, and their activities are coordinated through ECOSOC and the Chief Executives Board. Three of the best known examples illustrate their reach.

UNICEF, the United Nations Children’s Fund, was established in 1946 to help children affected by the Second World War. Today it works in nearly every country to protect children’s rights, provide nutrition and clean water, support education, and procure vaccines that reach a large share of the world’s children. UNDP, the United Nations Development Programme, is the organisation’s main development agency and plays a central role in helping countries achieve the Sustainable Development Goals. UNEP, the United Nations Environment Programme, was created in 1972 and serves as the leading voice for the environment within the UN system. It has driven landmark agreements such as the Montreal Protocol on the ozone layer and the Minamata Convention on mercury.

Specialised agencies 🔗

Specialised agencies are different in an important way. Bodies such as the World Health Organization, UNESCO, the International Labour Organization, and the Food and Agriculture Organization are autonomous organisations with their own membership, leadership, budgets, and governing boards. They are linked to the UN through formal agreements under Articles 57 and 63 of the Charter, and ECOSOC coordinates their work, but they do not take orders from the General Assembly or the Secretary-General. This autonomy lets them specialise deeply in their fields while still operating as part of the broader UN family.

How it all fits together 🔗

The genius and the frustration of the UN both lie in this layered structure. The principal organs provide political direction and legal authority. The funds and programmes deliver aid and development work directly to people. The specialised agencies bring technical expertise to areas like health, labour, and education. ECOSOC ties the development and social work together, while the Security Council holds the hard power over matters of war and peace. The result is an organisation with an enormous scope of responsibilities, capable of vaccinating children, mediating conflicts, setting international law, and managing natural resources all at once, yet also constrained by the political compromises built into its foundations.

What do you think? Given that the Security Council’s structure still reflects the power balance of 1945, do you believe the veto should be reformed or abolished to make the UN more representative? And which part of the UN system, the political organs or the development agencies, do you think has the greatest impact on ordinary lives?

References

1. https://www.un.org/en/about-us/main-bodies
2. https://www.britannica.com/topic/United-Nations/Principal-organs
3. https://www.cfr.org/backgrounders/un-security-council
4. https://main.un.org/securitycouncil/en/content/voting-system
5. https://www.un.org/en/about-us/un-system
6. https://guides.ll.georgetown.edu/c.php?g=365747&p=7140280
7. https://guides.monmouth.edu/unitednations/agencies
8. https://research.un.org/en/docs/unsystem/fundsprogs
9. https://www.amun.org/specialized-agencies/