WHAT IS DARWINISM ? 37 



that he does not confine his theory to organic 

 structure, but applies it to all the instincts and 

 all the forms of intelligence manifested by irra- 

 tional creatures. Nor does he stop there ; he 

 includes man within the sweep of the same 

 law. " In the distant future I see open fields 

 for far more important researches. Psychol- 

 ogy will be based on a new foundation, that 

 of the necessary acquirement of each mental 

 power and capacity by gradation. Light will 

 be thrown on the origin of man and his his- 

 tory." (p. 577) 



The " distant future " was near at hand. In 

 his introduction to his work on the "Descent 

 of Man," he says, he had determined not to 

 publish on that subject, " as I thought that I 

 should thus only add to the prejudices against 

 my views. It seemed to me sufficient to indi- 

 cate, in the first edition of my ' Origin of 

 Species,' that 'by this work 'light would be 

 thrown on the origin of man and his history ; ' 

 and this implies that man must be included 

 with other organic beings in any general con- 

 clusion respecting his manner of appearance on 

 this earth. Now the case wears a wholly dif- 

 ferent aspect. When a naturalist like Carl 

 Vogt (we shall see in what follows what kind 



