In order to arouse sympathy, the aristocracy was obliged to lose sight, apparently, of its own interests, and to formulate its indictment against the bourgeoisie in the interest of the exploited working class alone. Thus, the aristocracy took their revenge by singing lampoons on their new masters and whispering in his ears sinister prophesies of coming catastrophe.
Karl MarxWithout the presence of class warfare, trade unions would be hard put to justfy their existence.
Karl MarxOne of the most difficult tasks confronting philosophers is to descend from the world of thought to the actual world.
Karl Marx