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The United Nations was established on 24 October 1945 by 51 countries committed to preserving peace through international cooperation and collective security. Today, nearly every nation in the world belongs to the UN: membership totals 191 countries.
When States become Members of the United Nations, they agree to accept the obligations of the UN Charter, an international treaty that sets out basic principles of international relations. According to the Charter, the UN has four purposes: to maintain international peace and security; to develop friendly relations among nations; to cooperate in solving international problems and in promoting respect for human rights; and to be a centre for harmonizing the actions of nations.
The United Nations is not a world government and it does not make laws. It does, however, provide the means to help resolve international conflicts and formulate policies on matters affecting all of us. At the UN, all the Member States — large and small, rich and poor, with differing political views and social systems — have a voice and a vote in this process.
The United Nations is central to global efforts to solve problems that challenge humanity. Cooperating in this effort are more than 30 affiliated organizations, known together as the UN system. Day in and day out, the UN and its family of organizations work to promote respect for human rights, protect the environment, fight disease and reduce poverty. UN agencies define the standards for safe and efficient air travel and help improve telecommunications and enhance consumer protection. The United Nations leads the international campaigns against drug trafficking and terrorism. Throughout the world, the UN and its agencies assist refugees, set up programmes to clear landmines, help expand food production and lead the fight against AIDS.
More information Guided tours are conducted seven days a week, from 9:30 a.m. to 4:45 p.m., except during January and February, when tours are offered from Monday to Friday only. Tours in English normally leave every half hour and last for approximately 45 minutes to one hour. Opening hours are subject to change.