Did the Russian revolution cause the red scare?

Yes, the Russian Revolution of 1917 contributed to the Red Scare in the United States, particularly the first Red Scare from 1919 to 1920. The revolution led to fears of a communist uprising and the spread of radical leftist ideologies in the U.S. This anxiety was exacerbated by labor strikes, political unrest, and the emergence of the Bolshevik government, leading to widespread suspicion and repression of perceived radicals and anarchists in American society.