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.

Men make their own history

The history of all previous societies has been the history of class struggles.

Accumulation of wealth at one pole is at the same time accumulation of misery, agony of toil, slavery, ignorance, brutality, mental degradation, at the opposite pole

...the Communists everywhere support every revolutionary movement against the existing social and political order of things... They openly declare that their ends can be attained only by the forcible overthrow of all existing social conditions.

The leading princes are the most servile tools of English despotism. . . . The native princes are the stronghold of the present abominable English system.

The unity of the bourgeoisie can be shaken only by the unity of the proletariat.