NATURAL HISTORY STUDIES 



endeavour. But the struggle includes more than 

 increased competition, it includes, just as promin- 

 ently, increased combination and mutual aid. 

 Nature has rewarded both these lines of solution 

 with success and survival, but the line of mutual 

 aid and sociality has been especially associated 

 with the improvement of brains and good-will, and 

 it is the line which we must especially follow. 



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