During the Cold War, the political ideology of the U.S. was primarily characterized by capitalism and democracy, often referred to in opposition to Soviet communism. The U.S. played a leading role in promoting democratic governance, individual freedoms, and market-based economies as part of its foreign and domestic policies. This ideological divide influenced global relations, military strategies, and cultural exchanges. The U.S. sought to contain the spread of communism through initiatives like the Truman Doctrine and the Marshall Plan, fostering alliances and conflicts worldwide, fundamentally shaping international relations during the 20th century.