CONTENTS 



PART I 

 NATURAL SELECTION OF HUMAN INTELLIGENCE 



CHAPTER PAGE 



I. Brute-Man's Helplessness n 



II. Extent of the Era of Helplessness ... 28 



III. Forcing Intelligence 70 



PART II 

 SOCIAL, MORAL, AND ECONOMIC PROGRESS 



IV. Separation of Sexes 91 



V. Natural Selection of Man's Devotion . 106 



VI. Natural Selection of Family Relations . 123 



VII . The Family, Monogamic Marriage, Economic 



Dependence of Woman, the Home . 128 



VIII. Mental and Esthetic Complementariness 



of the Sexes 135 



IX. How Perversion of Race Character Origi- 

 nated Warfare, Groups, Hordes, etc. . 141 

 X. A New Factor Initiating a New Era. . 161 



APPENDIX 



NOTE 



I. Articulate Speech 187 



II. On Memory 190 



9 



