Luxury is the opposite of the naturally necessary.

In proportion as the bourgeoisie, i.e., capital, is developed, in the same proportion is the proletariat, the modern working class, developed - a class of labourers, who live only so long as they find work, and who find work only so long as their labour increases capital. These labourers, who must sell themselves piecemeal, are a commodity, like every other article of commerce, and are consequently exposed to all the vicissitudes of competition, to all the fluctuations of the market.

Science and democracy are the right and left hands of what I'll refer to as the move from the realm of necessity to the realm of freedom.

The method of production of the material things of life generally determines the social, political and spiritual currents of life.

The philosophers have only interpreted the world, in various ways: the point, however, is to change it.

Let the ruling classes tremble at a communist revolution. The proletarians have nothing to lose but their chains. They have a world to win. Workingmen of all countries, unite!

Labor in the white skin can never free itself as long as labor in the black skin is branded.