2 is a proletariat prime, but 4, 6 and 8 are also composite proletariats. Composites of the world unite; you have nothing to lose but your chains!

The product of mental labor - science - always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.

One of the most difficult tasks confronting philosophers is to descend from the world of thought to the actual world.

A heavy progressive or graduated income tax.

The burgeoisie, by the rapid improvement of all instruments of production, by the immensely facilitated means of communication, draws all nations into civilization.

All history is nothing but a continuous transformation of human nature.

In all of human history no country or no people have suffered such terrible slavery, conquest and foreign oppression and no country and no people have struggled so strenuously for their emancipation than Sicily and the Sicilians.