April 25, the end Europe, 50 countries met in San Francisco to draft the United Nations system of organizations. They proposed the drafting of the Charter of the organization in the world, all of the international peace can discuss the differences between countries can make joint efforts to eliminate hunger and disease. After the First World War, the United States Senate has opposed the United States to participate in the League of Nations, and this time, the Senate by 89 votes to two votes, quickly approved the Charter of the United Nations. This action confirmed that isolationism is no longer a U.S. foreign policy in a decisive factor to the world that the United States intends to play an important role in international affairs.