Final answer:
McCarthyism refers to the practice of making accusations of treason or disloyalty without proper evidence, which was characterized by Senator Joseph McCarthy's anti-Communist activities during the Cold War. McCarthy claimed to have lists of Communists in the government but never provided proof, resulting in a climate of fear and suppression of dissent and progressive initiatives.
Step-by-step explanation:
McCarthyism is best defined as the practice of making accusations of treason or disloyalty without proper evidence. Named after Senator Joseph McCarthy, this term embodies both the anti-Communist hysteria of the postwar period and McCarthy's specific approach to targeting perceived enemies. McCarthy exploited fears of Communist infiltration by alleging, without evidence, that certain individuals and government agencies were disloyal or treasonous.
During the height of the Cold War, McCarthy claimed to have lists of "card-carrying Communists" within the government but never produced any credible proof. His accusations contributed to a climate of fear and repression, resulting in blacklisting and the ruin of many careers in Hollywood and beyond. The consequences of McCarthy's actions led to an era where questioning Cold War policies was seen as un-American and repressed not only dissent but also progressive legislation. McCarthyism essentially became synonymous with the unfounded paranoia and authoritarian tactics that characterized the era.