I'm just wondering, what if the European nations back in the mid-19th Century didn't decide to back the Confederacy against the Union? Borderline-ASB I know, what with memories of the Napoleonic Wars meaning that European mentalities were against really large nations - with the hypocritical exceptions of the continent-spanning Russian Empire and the world-spanning British Empire - that could dominate entire continents of their own. It's pretty much a given that the Confederacy would have been toast without European help, but assuming they didn't get help, how would world history have gone?