Despite the tensions of the Cold War, the United States enjoyed a period of great prosperity and growth in the postwar decades. Its booming economy became a symbol of the power of capitalism and democratic freedoms in the ongoing propaganda war against communism.
New York City was chosen as the headquarters of the new United Nations.
In the postwar decades, the American economic system flourished. American businesses expanded into markets around the globe. The dollar was the world's strongest currency. Foreigners flocked to invest in American industry and to buy U.S. government bonds. America's wealth was a model for other democracies and a challenge to the stagnant economies of the communist world.
During the Cold War, the United States was a global political leader. The headquarters of the League of Nations had been symbolically located in neutral Switzerland. The headquarters of the newly formed United Nations was built in New York City.
The United States also played a leading economic role. America had emerged untouched from the horrendous destruction of the Second World War. Other nations needed American goods and services, and foreign trade helped the United States achieve a long postwar boom. The long postwar peace among democratic nations helped to spread this boom worldwide.