The philosophers have only interpreted the world, in various ways. The point, however, is to change it.[These words are also inscribed upon his grave]

Freeman and slave, patrician and plebeian, lord and serf, guild-master and journeyman, in a word, oppressor and oppressed, stood in constant opposition to one another, carried on an uninterrupted, now hidden, now open fight, a fight that each time ended, either in a revolutionary re-constitution of society at large, or in the common ruin of the contending classes.

In the various stages of development which the struggle of working class against the bourgeoisie has to pass through, they always and everywhere represent the interests of the movement as a whole.

Darwin's book is very important and serves me as a basis in natural science for the class struggle in history. One has to put up with the crude English method of development, of course. Despite all deficiencies not only is the death-blow dealt here for the first time to 'teleology' in the natural sciences, but their rational meaning is empirically explained.

Wages are determined by the bitter struggle between capitalist and worker.

What I did that was new was to prove that the existence of classes is only bound up with particular, historical phases in the development of production; that the class struggle necessarily leads to the dictatorship of the proletariat; and that dictatorship itself only constitutes the transition to the abolition of all classes and to a classless society.