IV CONTENTS. 



PACK 



Natural Selection and Ethics, 56 



Law of Self-Activity, - 61 



Law of Mutual Help, or Altruism, - 64 



The Origin of Goodness, - - 68 



Degeneration, - 70 



Degeneration in Man, - 72 



The Industrial Struggle for Existence, 75 



Isolation as a Factor in Evolution, - 77 



Are Species Real ? 78 



Classification, - 82 



Application of Theory of Descent to Taxonomy, - 84 

 Application of Theory of Descent to Taxonomy. Object 



and Methods of Taxonomic Work, - 85 

 Application of Theory of Descent to Taxonomy. Illus- 

 tration of the Application of This Method. The 

 Descent of the Lepidoptera, 87 

 Evolution of Plants, - 91 

 Evolution of the Higher Plants, 93 

 Spontaneous Generation, - - 95 

 Man's Place in Nature, 96 

 Evolution in Social Institutions. Principles, - - 101 

 Evolution of Social Institutions. Applications and Il- 

 lustrations, 103 

 History of Evolution, - 105 

 After Darwin, - 109 

 Spencer's Formula of Evolution, - - 110 

 Present Battle-Grounds of Evolution, 112 

 The Philosophy of Despair, - 117 

 The Way Out of Pessimism, - 119 

 Philosophy and Science, - - 122 

 Religion and Science, - 125 

 The Evolution of Religion, - - - - 127 



