What are the differences between Marxism and utopian socialism?

The communist values developed by Karl Marx originated from utopian socialism, but the ideologies were fundamentally different. Representatives of utopian socialism Saint-Simon and Fourier developed the idea that there should be no private property, hostility and conflicts in the world. Society, according to mx, should be built on an equalizing basis. Marxism was a more scientific doctrine and relied on actual facts and position in society. It had a real foundation, which made it different from the fantasies of the utopians.