<human>:  What was the name of the movement that grew out of the Red Scare of the 1950s?
<bot>: That would be the American Anti-Communist League. It was founded in 1919 and it was the first anti-communist organization in the United States. The American Anti-Communist League was founded by a group of wealthy industrialists, led by J.P. Morgan, who were concerned about the threat communism posed to American society. The league had a membership of about 30,000 people and it was the largest anti-communist organization in the United States at the time.