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.
the UN and its family of organizations work to promote respect for human rights, protect the environment, fight disease and reduce poverty.
The United Nations was established on October 24, 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
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 has six main organs. Five of them ? the General Assembly, the Security Council, the Economic and Social Council, the Trusteeship Council and the Secretariat ? are based at UN Headquarters in New York. The sixth, the International Court of Justice, is located at The Hague in the Netherlands.
The General Assembly
All UN Member States are represented in the General Assembly ? a "parliament of nations" which meets to consider the world's most pressing problems. Each Member State has one vote. Decisions on such key issues as international peace and security, admitting new members and the UN budget are decided by two-thirds majority. Other matters are decided by simple majority.
The Assembly holds its annual regular session from September to December. When necessary, it may resume its session or hold a special or emergency session on subjects of particular concern. When the Assembly is not meeting, its work is carried out by its six main committees, other subsidiary bodies and the UN Secretariat.
The Security Council
The UN Charter gives the Security Council primary responsibility for maintaining international peace and security. The Council may convene at any time, whenever peace is threatened.
There are 15 Council members. Five of these ? China, France, the Russian Federation, the United Kingdom and the United States ? are permanent members. The other 10 are elected by the General Assembly for two-year terms. Member States are discussing making changes in Council membership and working to reflect today's political and economic realities.
Decisions of the Council require nine yes votes.
The Council also makes recommendations to the General Assembly on the appointment of a new Secretary-General and on the admission of new Members to the UN.
The Economic and Social Council
The Economic and Social Council, under the overall authority of the General Assembly, coordinates the economic and social work of the United Nations and the UN family of organizations. As the central forum for discussing international economic and social issues and for formulating policy recommendations, the Council plays a key role in fostering international cooperation for development.
The Council has 54 members, elected by the General Assembly for three-year terms. It meets throughout the year and holds a major session in July, during which a special meeting of Ministers discusses major economic, social and humanitarian issues.