What is McCarthyism and how did it happen?

In the 1950s, as part of a campaign to expose suspected Communists, thousands of individuals were aggressively investigated and questioned before government panels. Named after its most notorious practitioner, the phenomenon known as McCarthyism destroyed lives and careers. But how did this episode of political repression take off? Ellen Schrecker traces the history of McCarthyism.

Lesson by Ellen Schrecker, animation by Patrick Smith.