CONTENTS 



CHAPTER PAGE 



A FOREWORD i 



I. EVOLUTION BEFORE DARWIN ^ 



II. DARWIN AND WALLACE 21 



III. THE UNDERLYING IDEA 44 



IV. ADAPTATION FOR THE INDIVIDUAL 87 



V. ADAPTATION FOR THE SPECIES 125 



VI. LIFE IN THE PAST 149 



VII. How THE MAMMALS DEVELOPED 192 



VIII. THE STORY OF THE HORSE 220 



IX. EVOLUTION SINCE DARWIN 233 



X. THE FUTURE EVOLUTION OF MAN 249 



XI. SCIENCE AND THE BOOK 274 



INDEX 293 



