McCarthyism polarized different factions, pitting the McCarthyites against many others. It destroyed the careers of many entertainers; it caused foment on campuses; it demanded that teachers and other civil servants take loyalty oaths.
See this site for more details.
http://www.spartacus.schoolnet.co.uk/USAmccarthyism.htm
How did McCarthyism affect the lives and political thinking of people in the U.S.
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