xiv INTRODUCTION 



an " open sesame " to new fields, new volumes 

 of personal discovery, new impulses to fresh 

 workers. Naturalist and thinker, teacher 

 and pupil, will thus long be inspired by the 

 example of Darwin as rambler, traveller 

 and observer, yet also as dreamer and inter- 

 preter. The study of biology is thus by no 

 means merely abstract, nor mainly in the 

 library; it ever arises from and returns to 

 living nature, and goes on throughout that 

 annual season-drama of which we are but the 

 awakening spectators. 



So psychology has its concrete nature- 

 observation in child study, in animal be- 

 haviour; and just as ethics has its side of 

 everyday life, so sociology its current events. 

 Nature studies and social studies must again 

 be generalized, and this not only separ- 

 ately but in unison. How so ? By and 

 from Regional Survey. Relief and climate, 

 geological and botanical surveys, anthropo- 

 logical, archaeological and historic surveys 

 all underlie our social studies. Our concrete 

 science thus generalizes into a comprehensive 

 regional survey, natural and social, rural and 

 urban; as our abstract sciences advance and 

 unite into a philosophy of evolution. In 

 measure as our abstract interpretations and 

 our concrete surveys come together and unify ; 



