INTRODUCTION 



BY 

 T. C. CHAMBERLIN 



The greatness of a man is shown in what he 

 is, in what he does, and in what he sets a-doing. 



If the long hst of contributions to the ses- 

 sions of this Association for these fifty years 

 were searched for products of thought whose 

 stimulus sprang from the life and works of 

 Charles Darwin, it would reveal an impressive 

 testimonial to his greatness as a power in our 

 scientific world. If it were possible to give such 

 an intellectual product a material embodiment 

 and an appropriate form, we could raise no more 

 sincere monument to his memory. Even in the 

 less tangible form it inevitably bears, it is our 

 monument. By responses, individual and col- 

 lective, to the marvelous suggestiveness of Dar- 

 win's inquiries and interpretations, the members 

 of this Association during the last half century 

 have been paying their truest tributes. More or 

 less unconsciously, no doubt, but none the less 

 genuinely, we have thus been doing honor to one 

 of the greatest of intellectual leaders. 



The magnitude of any moving force is meas- 

 ured scarcely less by the obstacles surmounted 



