"Fahrenheit 451" by Ray Bradbury explores themes such as censorship, suppression of free speech, and government control over information and thought. McCarthyism, the anti-communist movement in the United States during the 1950s, created an atmosphere of fear, suspicion, and conformity that aligns with the dystopian world depicted in the novel. The book reflects the dangers of a society where independent thinking is suppressed and critical ideas are censored, which resonates with the impact of McCarthyism on American society at the time.