‘A FOREWORD 5 
brought it about. It tries to tell a little of the men 
who have helped to develop the great idea of evo- 
lution, of the great men who persuaded the scientific 
world of its truth, and of the later minds that are 
modifying and enlarging the idea of the master evo- 
lutionist. It tries to tell what science perhaps vaguely 
hopes as to the future. What are we to be? Can we 
help the great advance? 
