The fear of communism in the United States was a manifestation of
political anxiety over the infiltration of international influences,
namely tied to Soviet Russia, during the 20th century. The philosophical
basis of this fear was based on the significant differences between
capitalism and communism as economic systems, while the most noteworthy
historical examples of it were the Red Scare after World War I,
McCarthyism in the 1950s and the Cold War.
