"In his eyes the main object of the state was to manufacture war power instead of merely insuring itself against war. What Clausewitz really did was to democratize war, and when the spirit of his doctrines was coupled with that of Darwin's "The Origin of Species" (1859), they produced the Prussian Military System; and when united with that of Karl Marx's Das Kapital (1867), they produced the Russian Military System. All three writers based their theories upon "mass struggle" — in war, in life and in economics."