CONTENTS 



PAGE 



Foreword xi 



PART I— EVOLUTION IN GENERAL 



CHAPTER 



I The Present Crisis in Evolutionary Thought . 1 



II Homology and Its Evolutionary Interpretation 31 



III Fossil Pedigrees 66 



PART II— THE PROBLEM OF ORIGINS 



I The Origin of Life 131 



II The Origin of the Human Soul 189 



III The Origin of the Human Body . . . . . 268 



Afterword 349 



31 5- 



^^^ 



