CONTENTS 



CHAPTER I 



EVOLUTION AND DARWINISM 



PAGE 



Before Darwin — Domestication; breeding; artificial 

 selection — Natural selection — Fact and theory — 

 Racial evolution and individual development — 

 Progress through experiment — The struggle for 

 existence • . . . I 



CHAPTER n 



STAGES OF HUMAN EVOLUTION 



Physical evolution — ^The single cell — ^The age of diges- 

 tion and reproduction — ^Worms, and the dawn of 

 muscular locomotion — Experiments with a skeleton 

 — Clams — Insects — Fish, and a backbone — Am- 

 phibia and reptiles; the development of legs — Land 

 life and air-breathing — Warm blood and intelligence 

 — Arboreal life; the hand and erect posture — 

 Order of succession in the development of muscles 

 and nerve centers 22 



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