World Original explainer
193 countries, one building in New York, and no army of its own. A plain guide to the UN.
The United Nations appears in the news almost every day: a resolution here, a peacekeeping mission there, a warning about a war somewhere. Yet for most people it remains a mystery. What exactly is the UN? Who runs it? And why does it so often seem unable to stop the very wars it was created to prevent? The answers are simpler than the headlines suggest, and they start in 1945.
The UN was born out of the Second World War, the deadliest conflict in history. Its founders wanted a place where countries would talk before they fought, and a system that could keep the peace. Eighty years on, it is the largest international organisation in the world, with 193 member states, almost every country on Earth.
After the First World War, countries had tried a similar idea called the League of Nations. It failed, and the world slid into a second, even worse war. In 1945, as the war was ending, representatives of 50 countries met in San Francisco and wrote the UN Charter, the organisation's founding document. The Charter was signed on 26 June 1945 and came into force on 24 October 1945, a date still observed as United Nations Day. The UN began with 51 member states. Today it has 193, plus two observer states, the Holy See and the State of Palestine.
The Charter sets out the UN's purposes in plain terms: to maintain international peace and security, to develop friendly relations among nations, and to promote cooperation on economic, social and humanitarian problems. Its headquarters stands on the East River in New York, and its working languages include English, French, Spanish, Russian, Chinese and Arabic.
The UN has six principal organs. The General Assembly is the big debating chamber, where all 193 member states sit and each country gets one vote. It can discuss anything and pass resolutions, but those resolutions are recommendations, not laws. The Security Council is the smaller, more powerful body, charged with maintaining peace and security. It has 15 members: five permanent members, China, France, Russia, the United Kingdom and the United States, and ten others elected for two-year terms.
The other organs are the Economic and Social Council, which coordinates work on development and human rights; the International Court of Justice in The Hague, which settles disputes between countries; the Trusteeship Council, which has finished its original work; and the Secretariat, the UN's staff, led by the Secretary-General. The Secretary-General is the organisation's chief administrator and its public face. Antonio Guterres of Portugal has held the post since January 2017, and his second five-year term ends on 31 December 2026, with the process to choose his successor already under way.
Around these organs sits a family of specialised agencies that do much of the UN's daily work: the World Health Organization, the children's agency UNICEF, the food programme, the refugee agency, and the cultural body UNESCO, among others. Together they run vaccination drives, feed people in famines, shelter refugees, and set global standards on everything from aviation to post.
When the Security Council agrees, its decisions are binding on all members. It can impose sanctions, authorise military action, and set up peacekeeping missions. Peacekeeping began in 1948, and blue-helmeted troops have served in dozens of conflicts since, monitoring ceasefires, protecting civilians and helping countries rebuild after war. The UN also runs the world's largest humanitarian aid system, coordinates disaster relief, and provides the framework for treaties on climate change, nuclear weapons and human rights.
India has been part of the UN from the start, as a founding member, and has sent soldiers to peacekeeping missions for decades. It has also long campaigned, with other countries, for reform of the Security Council, arguing that its membership still reflects the world of 1945 rather than the world of today. India is seeking a non-permanent seat on the Council for the 2028-29 term.
Here is the part that confuses people most. The UN has no army of its own. Peacekeepers are soldiers lent by member countries, and they deploy only with the host country's permission. The UN cannot tax, cannot arrest, and cannot force a country to obey a General Assembly resolution.
The biggest limit is the veto. Each of the five permanent members of the Security Council can block any substantive resolution, even if the other 14 members support it. That is why the Council has repeatedly failed to act on major wars: Russia has vetoed resolutions on Ukraine, and the United States has vetoed several resolutions on Gaza. The veto was deliberately built into the Charter in 1945, because the founders believed the organisation would collapse if the great powers could be outvoted on matters of war and peace.
The UN also depends on its members for money, and that funding is not guaranteed. In January 2026, the United States announced it would withdraw from 31 UN entities, a reminder that the organisation is only as strong as its members allow it to be.
So is the UN useless? That is the wrong question. It was designed to be a meeting place, a provider of aid and a keeper of rules, not a world government. It has kept the peace in many places, fed millions, and given small countries a voice they would not otherwise have. Its failures are real, but most of them are the failures of its members to agree, not of the institution itself. Understanding that difference is the first step to understanding the UN.
This explainer was written by The Daily Short's desk from the sources listed above. It is general information, not professional advice. Spot an error? See our Corrections Policy or tell us via the Contact page and we will correct it. Follow our official Instagram @thedaily.short.