So what are the effects of the Communist Revolution of 1917? Whoa, that's the first effect. 20th century, baby. The whole 20th century is basically defined by this kind of, you know, us versus them world of the Soviet Union being the engine of communism, trying to spread it around the world and the United States and the Allied powers trying to stomp it out around the world. So that's really going to be the major effect is that we've split the world in a sense. Now this really doesn't come into fruition until after World War II because the Soviet Union immediately faced, this is another effect, its own civil war. From 1918 to 1923, the Russians fought themselves.