What is Marx's critique of the "utopian socialists"?
"Utopian Socialism" is a theoretical socialist state where all factors of culture, economics, and government are in perfect balance; everyone has the same access to everything and all work benefits the collective, and so there is no place for dissension or argument against the system. Cults and communes are often called modern Socialist Utopias, since their small size and group-think mentality dissuades people from developing ideas of personal achievement and responsibility.
Karl Marx, in developing his theories, criticised utopian socialism for skipping over class-warfare issues; Marx believed that the proletariat needed to fight and destroy the bourgeoisie, not recruit them. Marx also believed that utopian socialists were in reality attempting to become higher than the rulers, in essence becoming the bourgeoisie themselves. Essentially, Marx criticised utopian socialism for being impossible to achieve without revolution, and for being a naive political stance. Instead of trying to passively convince people to drop their political views and adopt one's own, Marx believed that the proletariat were meant to revolt and destroy the system, not live within or become rulers of the same system.