Political economy came into being as a natural result of the expansion of trade, and with its appearance elementary, unscientific huckstering was rep… - Friedrich Engels

The manufacturing worker almost always lives in the countryside and in a more or less patriarchal relation to his landlord or employer; the proletarian lives, for the most part, in the city and his relation to his employer is purely a cash relation. The manufacturing worker is torn out of his patriarchal relation by big industry, loses whatever property he still has, and in this way becomes a proletarian.

So long as it is not possible to produce so much that there is enough for all, with more left over for expanding the and extending the forces of production – so long as this is not possible, there must always be a ruling class directing the use of society's productive forces, and a poor, oppressed class. How these classes are constituted depends on the stage of development.

Just as Marx used to say about the French Marxists of the late ’seventies: All I know is that I am not a Marxist.