What Is the United Nations? How the UN Works and Why It Often Fails

The United Nations (UN) is the world's most important international organisation, with 193 member states and a mission to maintain peace, promote human rights, and coordinate global action on issues like climate change, poverty, and disease. It was created in 1945 after World War II to prevent another global conflict, and it has been credited with preventing World War III. But the UN is also deeply flawed: the Security Council veto means that any of the five permanent members (USA, UK, France, Russia, China) can block UN action, rendering it powerless in many conflicts. The UN has failed to stop wars in Syria, Yemen, Gaza, and Ukraine, and critics say it is outdated, ineffective, and dominated by great powers. Here is everything you need to know about the UN — how it works, what it does, and why it so often fails.

What Is the UN?

The United Nations is an international organisation founded in 1945 to:

• Maintain international peace and security
• Promote human rights
• Foster international cooperation on economic, social, and humanitarian issues
• Provide a forum for dialogue between nations

The UN replaced the League of Nations, which failed to prevent World War II.

The founding

The UN was created by the UN Charter, signed by 51 countries in San Francisco on 26 June 1945. The Charter came into force on 24 October 1945 (now celebrated as UN Day).

The founding members were the Allied powers of World War II, led by the USA, UK, Soviet Union, China, and France (the "Big Five").

Membership

The UN now has 193 member states — almost every country in the world. The most recent members are South Sudan (2011) and Montenegro (2006).

Non-members:

• Vatican City (observer state)
• Palestine (observer state)
• Taiwan (not recognised by the UN; China claims it as part of China)
• Kosovo (not recognised by all UN members)

How the UN Works

The UN has six main organs:

1. The General Assembly

The General Assembly is the UN's main deliberative body, where all 193 member states have one vote. It meets annually in New York (September–December) to debate and pass resolutions on international issues.

What it does:

• Debates global issues (peace, human rights, climate change)
• Passes resolutions (non-binding recommendations)
• Approves the UN budget
• Elects non-permanent members of the Security Council

Limitations:

• Resolutions are non-binding (countries can ignore them)
• Decisions require a two-thirds majority on important issues
• The General Assembly has no enforcement power

2. The Security Council

The Security Council is the UN's most powerful body, responsible for maintaining international peace and security. It has 15 members:

• 5 permanent members (P5): USA, UK, France, Russia, China (veto power)
• 10 non-permanent members (elected by the General Assembly for 2-year terms)

What it does:

• Authorises military action (peacekeeping, sanctions, use of force)
• Investigates threats to peace
• Calls for ceasefires and negotiations

The veto:

Each of the five permanent members has veto power, meaning they can block any Security Council resolution. If one permanent member votes "no," the resolution fails, even if the other 14 members vote "yes."

The veto has been used over 290 times since 1945:

• Russia/Soviet Union: 143 times (mostly on issues involving Russia or its allies)
• USA: 83 times (mostly on issues involving Israel)
• UK: 29 times
• France: 16 times
• China: 17 times

The veto is the UN's biggest weakness. It means the UN cannot act when one of the P5 opposes action, which is often the case in major conflicts.

3. The Secretariat

The Secretariat is the UN's administrative body, led by the Secretary-General (currently António Guterres, Portugal, elected 2017).

The Secretary-General is the UN's chief diplomat and spokesperson, and can bring issues to the Security Council's attention. But the role is largely symbolic — the Secretary-General has no power to enforce decisions.

The Secretariat employs 44,000 staff worldwide, working on peacekeeping, humanitarian aid, development, and administration.

4. The Economic and Social Council (ECOSOC)

ECOSOC coordinates the UN's economic, social, and environmental work. It has 54 members (elected by the General Assembly) and works with UN agencies like the WHO, UNICEF, and UNESCO.

5. The International Court of Justice (ICJ)

The ICJ (also called the World Court) is the UN's judicial body, based in The Hague, Netherlands. It settles disputes between countries and gives advisory opinions on legal questions.

The ICJ has 15 judges (elected by the General Assembly and Security Council) and hears cases on issues like border disputes, war crimes, and treaty violations.

Limitations:

• The ICJ can only hear cases if both countries agree to its jurisdiction
• Rulings are binding, but there is no enforcement mechanism (countries can ignore them)

6. The Trusteeship Council

The Trusteeship Council oversaw the decolonisation of former colonies after World War II. It suspended operations in 1994 after the last trust territory (Palau) gained independence.

What the UN Does

1. Peacekeeping

The UN deploys peacekeeping missions to conflict zones to monitor ceasefires, protect civilians, and support peace processes. Peacekeepers (known as Blue Helmets) are soldiers, police, and civilians contributed by member states.

Current missions (2024): 12 active peacekeeping missions, with 87,000 personnel deployed in countries including:

• Democratic Republic of Congo (MONUSCO)
• South Sudan (UNMISS)
• Mali (MINUSMA, ended 2023)
• Lebanon (UNIFIL)
• Cyprus (UNFICYP)

Cost: $6.5 billion per year (2024)

Successes: UN peacekeeping has helped end conflicts in Cambodia, Mozambique, El Salvador, and Liberia.

Failures: UN peacekeepers failed to prevent genocides in Rwanda (1994) and Srebrenica (1995), and have been accused of sexual abuse and exploitation in several missions.

2. Humanitarian aid

The UN coordinates humanitarian aid through agencies like:

• UNHCR (UN High Commissioner for Refugees) — protects refugees and displaced people
• UNICEF (UN Children's Fund) — provides aid to children
• WFP (World Food Programme) — fights hunger
• WHO (World Health Organization) — coordinates global health responses

The UN provides aid to over 100 million people per year, including refugees, victims of natural disasters, and people in conflict zones.

3. Development

The UN promotes economic and social development through:

• Sustainable Development Goals (SDGs) — 17 goals to end poverty, protect the planet, and ensure prosperity by 2030
• UNDP (UN Development Programme) — works on poverty reduction, governance, and climate change

4. Human rights

The UN promotes human rights through:

• Universal Declaration of Human Rights (1948) — sets out fundamental human rights
• Human Rights Council — investigates human rights abuses
• International Criminal Court (ICC) — prosecutes war crimes, genocide, and crimes against humanity (not part of the UN, but works closely with it)

5. Climate change

The UN coordinates global action on climate change through:

• UNFCCC (UN Framework Convention on Climate Change) — organises annual climate summits (COP)
• Paris Agreement (2015) — commits countries to limit global warming to 1.5–2°C

Why the UN Often Fails

1. The veto

The Security Council veto means the UN cannot act when one of the P5 opposes action. This has paralysed the UN in major conflicts:

• Syria (2011–present): Russia and China have vetoed 16 resolutions on Syria, preventing UN action to stop the war (500,000+ dead)
• Israel-Palestine: The USA has vetoed 53 resolutions critical of Israel, preventing UN action on the occupation and Gaza
• Ukraine (2022–present): Russia vetoed a resolution condemning its invasion of Ukraine

The veto is the UN's biggest weakness, and there is no realistic way to reform it (because the P5 would veto any reform).

2. No enforcement power

The UN has no army and cannot force countries to comply with its decisions. It relies on member states to enforce resolutions, which they often do not do.

For example, the ICJ ruled that Russia's invasion of Ukraine was illegal, but Russia ignored the ruling.

3. Dominated by great powers

The UN is dominated by the P5, who use the veto to protect their interests and those of their allies. Smaller countries have little power, and the General Assembly (where all countries have one vote) is largely symbolic.

4. Bureaucratic and slow

The UN is a large, bureaucratic organisation with 44,000 staff and dozens of agencies. Decision-making is slow, and coordination between agencies is poor.

5. Underfunded

The UN's regular budget is $3.4 billion per year (2024), funded by member contributions. The USA is the largest contributor (22%), followed by China (15%) and Japan (8%).

But the budget is small compared to the UN's responsibilities, and many countries do not pay their contributions on time.

The Case for the UN

Despite its flaws, the UN has achieved a lot:

1. Prevented World War III

The UN has provided a forum for dialogue between great powers, preventing direct conflict between the USA and Soviet Union/Russia during the Cold War and beyond.

2. Ended conflicts

UN peacekeeping has helped end conflicts in Cambodia, Mozambique, El Salvador, Liberia, and Sierra Leone.

3. Set international norms

The UN has established international norms on human rights, climate change, nuclear weapons, and more. These norms shape global behaviour, even if they are not always enforced.

4. Coordinated global action

The UN coordinates global action on issues like pandemics (COVID-19), climate change, and humanitarian crises. No other organisation can do this.

5. Provided a forum for diplomacy

The UN provides a neutral forum where countries can meet, negotiate, and resolve disputes peacefully. This is valuable, even if the UN cannot enforce its decisions.

Calls for Reform

Many argue the UN needs reform:

1. Expand the Security Council

Add more permanent members (e.g., India, Brazil, Germany, Japan, South Africa) to reflect the modern world. But the P5 oppose this because it would dilute their power.

2. Abolish or limit the veto

Abolish the veto, or limit it to issues involving the P5 themselves. But the P5 would veto any such reform.

3. Create a UN army

Give the UN its own standing army to enforce Security Council resolutions. But member states oppose this because it would undermine their sovereignty.

4. Increase funding

Increase the UN budget and ensure countries pay their contributions on time. But many countries are reluctant to pay more.

The Bottom Line

The UN has 193 member states and six main organs: General Assembly, Security Council, Secretariat, Economic and Social Council, International Court of Justice, and Trusteeship Council. The Security Council has 5 permanent members (USA, UK, France, Russia, China) with veto power, meaning any one can block UN action. The UN has deployed 71 peacekeeping missions since 1948, with 87,000 personnel currently deployed in 12 missions costing $6.5 billion per year. The veto has been used over 290 times, often blocking action on Syria, Israel-Palestine, and other conflicts, rendering the UN powerless. Critics say the UN is outdated, ineffective, and dominated by great powers, but supporters say it prevents wars, coordinates aid, and provides a forum for diplomacy. The UN is imperfect, but it is the only global organisation we have. Reforming it is difficult because the P5 will not give up their power, and abolishing it would leave a vacuum. The UN is only as effective as its member states allow it to be, and in a world of competing national interests, that is often not very effective at all.