Since the 1950s, "McCarthyism" has become shorthand for the practice of making unsubstantiated accusations of disloyalty against political opponents, often through fear-mongering and public humiliation.
The term gets its name from Senator Joseph McCarthy, a Republican who was the leading architect of a ruthless witch hunt in the US to root out alleged Communists and subversives across American institutions. [...]
Millions of federal employees had to fill out loyalty investigation forms during this time, while hundreds of employees were either fired or not hired. Hundreds of Hollywood figures were also blacklisted.
The campaign also involved the parallel targeting of the LGBTQI+ community working in government – known as the Lavender Scare. [...]
The greatest toll of McCarthyism was perhaps on public discourse. A deep chill settled over U.S. politics, with people afraid to voice any opinion that could be construed as dissenting.