[...] (1) that the conditions of existence of the proletarians (what we would today term social exclusion) are in contradiction with all the principles of that society; (2) that they themselves live by other values than those of private property, profit, patriotism and bourgeois individualism; and (3) that their growing opposition to the State and the dominant class is a necessary effect of the modern social structure, but one which will soon prove lethal for that structure.
Marx on the proletariat