The game sets up Russia with conditions that make an eventual communist revolt (and several other major revolts) very likely, although its success depends on a lot of other factors. The historical success of Lenin's revolution was far from certain, although the overthrow of the Czar by SOMEONE was nearly inevitable under the circumstances (historically, it wasn't by the communists alone), because there were numerous other possibilities which didn't pan out for various reasons that may or may not be valid in your current campaign.