DEVELOPMENT AND EVOLUTION 

 PART I 



THE PROBLEM OF GENESIS 



CHAPTER I 



Psychophysical Evolution 



§ I. Scope and Method 



The point of view from which the questions taken up 

 in the following pages are considered is still exclusively 

 that of the earher volumes of this series,^ the genetic. 

 But the broadening out of the range of discussion to in- 

 clude biological questions as well as psychological, makes 

 our method now Biogenetic rather than P sychogenetic — 

 a distinction made out in the volume on Social and Ethical 

 Interpretations. It is not now, in these discussions, a 

 question of the application of results, drawn from the 

 mental life exclusively, to the larger problem of racial and 

 social evolution ; it is rather the interpretation of the 

 whole series of facts drawn from all these spheres, exam- 

 ined with view to a general conception of genesis (subject 

 to the self-imposed limitations indicated in the Preface). 



The emphasis is, however, still on the mental, and the 



1 Mental Development in the Child and the Race, 2d edition reprinted, 

 1897, sJ^d Social and Ethical Interpretations, 3d ed. 1902. 



