If you butterfly the October Revolution, you butterfly the entire 20th Century, and quite a bit of the 21st century, as we know it. No Red Scare probably butterflies Hitler and Mussolini and therefore World War 2 and the Holocaust don't happen. You get rid of the wars in Korea, Vietnam, Afghanistan, and civil wars in places such as Angola and Nicaragua. Today, we would not have to worry about a nuclear North Korea or Vladimir Putin interfering in our election. No Holocaust probably means no Israel so the Middle East is very different. I made an entire
TL about this sort of world (albeit, instead of a Republican Russia, I went with a constitutional monarchy).