Bolshevism on Trial is a 1919 American silent propaganda film made by the Mayflower Photoplay Company and distributed through Lewis J. Selznick's Select Pictures Corporation.

Directed by Harley Knoles from a screenplay by Harry Chandlee, it is based on the 1909 novel Comrades: A Story of Social Adventure in California by Thomas Dixon, author of the novels The Clansman: A Historical Romance of the Ku Klux Klan and The Leopard's Spots that served as the basis for The Birth of a Nation.

Her concerned boyfriend Norman Worth, a World War I veteran wounded in combat, hears her lecture on the virtues of international socialism and is converted to her views.

Prompted by Herman, she raises money among her wealthy friends to buy Paradise Island off the Florida coast to establish a collective colony, a society of "happiness and plenty."

[5] As a promotion device, the April 15, 1919, issue of Moving Picture World suggested staging a radical demonstration by hanging red flags around town and then have actors in military uniforms storm in to tear them down.