“While this utopian, doctrinaire Socialism, which subordinates the total movement to one of its stages, which puts in place of common social production the brainwork of individual pedants and, above all, in fantasy does away with the revolutionary struggle of the classes and its requirements by small conjurers’ tricks or great sentimentality, while this doctrinaire Socialism, which at bottom only idealizes present society, takes a picture of it without shadows, and wants to achieve its ideal athwart the realities of present society; while the proletariat surrenders this Socialism to the petty bourgeoisie; while the struggle of the different socialist leaders among themselves sets forth each of the so-called systems as a pretentious adherence to one of the transit points of the social revolution as against another — the proletariat rallies more and more around revolutionary Socialism, around Communism, for which the bourgeoisie has itself invented the name of Blanqui. This Socialism is the declaration of the permanence of the revolution, the class dictatorship of the proletariat as the necessary transit point to the abolition of class distinctions generally, to the abolition of all the relations of production on which they rest, to the abolition of all the social relations that correspond to these relations of production, to the revolutionizing of all the ideas that result from these social relations.”
– Karl Marx, “The Class Struggles in France”