Karl Marx

He certainly wasn't that bright either
Anyone can look at a diagram of 'low, middle and upper class' and then just remove the middle part and call it a day.. literally every communist country is exactly that at all times.

He also ripped off previous socialists who weren't as psychotic as he was. Most of the pre-Marx socialists were just writing theory or airing their grievances against corrupt government. Many of them looked at what the Founding Fathers were doing and attempting and felt their ideas were some of the best ideas for a free society to come along.

He also, like his follower years later, was a self hating Jee from Germany. He wanted the extermination of all Jews. He wanted kill of other groups of people, like Africans and Scots (whom he wanted to also kill). He referred to Africans as the "N" word. He wrote love poetry to Satan.