 Following Yalta, 50 countries met together at the United Nations in 1945  United Nations Charter- signed on June 26, 1945 by 50 countries  The UN officially came into existence on October 24, 1945,

 United Nations consists of two main bodies: the General Assembly and the Security Council.  The Security Council is primarily responsible for the maintenance of international peace and security.

 The Security Council was crippled by the veto, which by the end of 1955 had been used 78 times, 75 of them by the Soviet Union.  Severe financial pressures have also served to restrict UN action. A number of countries, including the USSR, have refused to pay for UN actions, such as the Congo operation  Finally, the major powers have tended to deal with each other outside the framework of the UN.

 Since the early 1970s, the UN expanded its development of less developed countries. The UN and its related agencies have had a significant impact in disease control, aid to refugees, and technological cooperation

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