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After the mid-1950s, McCarthyism began to decline, mainly due to Joseph McCarthy's gradual loss of public popularity and credibility after several of his accusations were found to be false, and sustained opposition from the U.S. It was characterized by heightened political repression and persecution of left-wing individuals, and a campaign spreading fear of alleged communist and socialist influence on American institutions and of espionage by Soviet agents.
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Senator Joseph McCarthy and covers the period of the late 1940s through the 1950s. The term originally referred to the controversial practices and policies of U.S. McCarthyism is the practice of making accusations of subversion and treason, especially when related to anarchism, communism, and socialism, and especially when done in a public and attention-grabbing manner.
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