80 EVOLUTION, SOCIAL AND ORGANIC 



cial environment will not solve the problem 

 presented by the slum, the sweatshop and the 

 jail, as Socialists assert, we are justified in 

 nailing the statement as false, and a libel on 

 human nature. And in so doing, we are not 

 sentimental dreamers of dreams, crying for 

 the moon, but rigid analysts and investigat- 

 ors, and, as Lassalle once proudly said, "We 

 have behind us the science and the learning 

 of our day," 



