How did McCarthyism limit the actions non-communists could take?

In the McCarthy era of the 1950s, anti-Communism created an atmosphere of fear which allowed political actors to accrue greater powers over the American population. The legal status and rights of the individual were profoundly changed as the norms of fair trials were subverted, constitutional rights ceased to apply and new laws restricted personal freedoms. This dissertation argues that this unusual situation was permitted as the public were manipulated by people with political interests into believing the USA had entered into a state of emergency in order to safeguard national security.

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would it be plagiarism to copy and paste off of here? ?

answer; utilitarian;