SELECTION 143 



the work and thought above summarized, 

 we cannot but think that the secret of varia- 

 bility lies yet deeper, in the very nature of 

 the living organism itself. It has been a 

 Proteus from the first; changefulness is its 

 most abiding quality; in short, the essence 

 of the creature is its innate creativeness. 



CHAPTER V 



SELECTION 



Huxley on " The Quintessence of Darwinism ** Analytic 

 Abstract of "The Origin of Species" (Variation under 

 Domestication Artificial Selection Variation under 

 Natural Conditions Struggle for Existence Natural 

 Selection), 



The Case for Natural Selection Direct Evidence of 

 Natural Selection Implications of the Concept of 

 Natural Selection Different Kinds of Selection (Sexual 

 Selection Germinal Selection) Family and Group 

 Selection Auxiliary Hypothesis of Isolation Eugenics 

 as a Renewal of Evolution. 



DARWIN'S achievement in " The Origin of 

 Species " was twofold. In the first place, 

 he presented the evidences of the fact of 

 evolution so forcibly and so fairly that he 

 made evolutionists of the great majority of 

 his readers. Indeed, he made the world 

 " think hi terms of evolution." In the second 

 place, in his theory of Nature's sifting of 



