CONTENTS 



PREFACE . 



CHAPTER I 

 RACE SUICIDE OB A NATURAL LAW? . . . .15 



CHAPTER II 

 THE PRINCIPLE DEDUCED . . . .37 



CHAPTER III 



THE PRINCIPLE AS MANIFESTED IN THE VEGETABLE 

 KINGDOM . . . . . . .44 



CHAPTER IV 

 ON NERVOUS ENERGY . . . . . .56 



CHAPTER V 

 THE PRINCIPLE AS MANIFESTED IN THE ANIMAL KINGDOM . 71 



CHAPTER VI 

 THE PRINCIPLE AS MANIFESTED IN HUMAN SOCIETY . . 96 



CHAPTER VII 



THE PRINCIPLE AS MANIFESTED AMONG UNICELLULAR 



ORGANISMS ....... 138 



CHAPTER 

 ASEXUAL GENESIS AND OVULATION . . . .147 



13 



