United States: The United States in a Divided World

The United States in a Divided World

The most striking postwar development was America's new peacetime involvement in international affairs. U.S. support for the United Nations symbolized its desire for peace and order in international relations. However, relations between the United States and the Soviet Union worsened during the late 1940s. In addition, a serious human problem was presented by Europe, prostrated and near starvation after years of war. The Truman Doctrine attempted to thwart Soviet expansion in Europe; massive loans, culminating in the Marshall Plan, were vital in reviving European economies and thus in diminishing the appeal of Communism.

As the cold war intensified, the United States took steps (1948) to nullify the Soviet blockade of Berlin and played the leading role in forming a new alliance of Western nations, the North Atlantic Treaty Organization (NATO). In the Korean War, U.S. forces played the chief part in combating the North Korean and Chinese attack on South Korea. Thus the United States cast off its traditional peacetime isolationism and accepted its position as a prime mover in world affairs.

International policy had significant repercussions at home. The fear of domestic Communism and subversion almost became a national obsession, culminating in such sensational events as the Alger Hiss case and the trial and execution of Julius and Ethel Rosenberg (see Rosenberg Case). Security measures and loyalty checks in the government and elsewhere were tightened, alleged Communists were prosecuted under the Smith Act of 1940, and employees in varied fields were dismissed for questionable political affiliations, past or present. The most notorious prosecutor of alleged Communists was Senator Joseph McCarthy, whose extreme methods were later recognized as threats to freedom of speech and democratic principles.

Two decades of Democratic control of the White House came to an end with the presidential election of 1952, when Dwight D. Eisenhower was swept into office over the Democratic candidate, Adlai E. Stevenson. Although it did not try to roll back the social legislation passed by its Democratic predecessors, the Eisenhower administration was committed to a laissez-faire domestic policy. By the mid-1950s, America was in the midst of a great industrial boom, and stock prices were skyrocketing. In foreign affairs the Eisenhower administration was internationalist in outlook, although it sternly opposed Communist power and threatened “massive retaliation” for Communist aggression. Some antagonism came from the neutral nations of Asia and Africa, partly because of the U.S. association with former colonial powers and partly because U.S. foreign aid more often than not had the effect of strengthening ruling oligarchies abroad.

In the race for technological superiority the United States exploded (1952) the first hydrogen bomb, but was second to the USSR in launching (Jan. 31, 1958) an artificial satellite and in testing an intercontinental guidedmissile. However, spurred by Soviet advances, the United States made rapid progress in space exploration and missile research. In the crucial domestic issue of racial integration, the U.S. Supreme Court in a series of decisions supported the efforts of African-American citizens to achieve full civil rights. In 1959, Alaska and Hawaii became the 49th and 50th states of the Union. Despite hopes for “peaceful coexistence,” negotiations with the USSR for nuclear disarmament failed to achieve accord, and Berlin remained a serious source of conflict.

In 1961, the older Eisenhower gave way to the youngest President ever elected, John F. Kennedy, who defeated Republican candidate Richard M. Nixon. President Kennedy called for “new frontiers” of American endeavor, but had difficulty securing Congressional support for his domestic programs (integration, tax reform, medical benefits for the aged). Kennedy's foreign policy combined such humanitarian innovations as the Peace Corps and the Alliance for Progress with the traditional opposition to Communist aggrandizement.

After breaking relations with Cuba, which, under Fidel Castro, had clearly moved within the Communist orbit, the United States supported (1961) an ill-fated invasion of Cuba by anti-Castro forces. In 1962, in reaction to the presence of Soviet missiles in Cuba, the United States blockaded Soviet military shipments to Cuba and demanded the dismantling of Soviet bases there. The two great powers seemed on the brink of war, but within a week the USSR acceded to U.S. demands. In the meantime, the United States achieved an important gain in space exploration with the orbital flight around the earth in a manned satellite by Col. John H. Glenn. The tensions of the cold war eased when, in 1963, the United States and the Soviet Union reached an accord on a limited ban of nuclear testing.

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