DARWIN'S NATURAL SELECTION 39 



portant development of social science by a 

 work which long passed unnoticed, and which 

 bore the title : "Critique of Political Economy" 

 by Karl Marx — it was the forerunner of 

 Capital. What Darwin's book on the "Origin 

 of Species" is on the subject of the genesis and 

 evolution of organic life from non-sentient 

 nature up to Man, the work of Marx is on the 

 subject of the genesis and evolution of associa- 

 tion among human beings, of States, and the 

 social forms of humanity." 



Commenting on this passage of Jacoby's 

 Enrico Ferri says: "And this is why Germany, 

 which has been the most fruitful field for the 

 development of the Darwinian theories, is 

 also the most fruitful field for the intelligent, 

 systematic propaganda of socialist ideas. And 

 it is precisely for this reason that in Berlin, 

 in the windows of the book-stores of the so- 

 cialist propaganda, the works of Charles Dar- 

 win occupy the place of honor beside those of 

 Karl Marx." 



Frederick Engels, in his reply to Duehring, 

 speaks of Darwin as follows : "He dealt the 

 metaphysical conception of nature the heaviest 

 blow by his proof that all organic beings, 

 plants, animals, and man himself, are the 

 products of a process of evolution going on 



