President Truman said in his State of the Union Address, January 21, 1946, “ The United Nations organization now being established represents a minimum essential beginning. . . .Our ultimate security requires more than a process of conciliation and compromise. It requires that we begin now to develop the United Nations organization as the representative of the world as one society.”
In a speech delivered on June28, 1945, President Truman endorsed world government. He said “It will be just as easy for nations of the world to get along in the republic of the world as it is for you to get along in the republic of the United States. Now when Kansas and Colorado have a quarrel over the water in the Arkansas River, they don’t call out the National Guard in each state and go to war over it. They bring suit in the Supreme Court of the United States and abide by the decision There isn’t any reason in the world why we can’t do that internationally.”
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When Communist North Korea invaded South Korea in 1950, President Truman responded to North Korean aggression by organizing a United Nations “police force” to contain the spread of Communism. The U.S. was only 25 % mobilized, cooperating with other nations of the world to thwart aggression. The Korean Police Action became an important milestone in the development of world law.