HUMAN LIFE 



species hard pressed to exist in its native 

 habitat, may release it from the too 

 severe rigors of a destructive climate, 

 or take it beyond the habitat of its 

 most dangerous enemies, or give it the 

 needed space and food for the support 

 of a numerous progeny. Thus, such a 

 single phenomenon as migration might 

 ameliorate any one or more of the sev 

 eral phases of the struggle for exist 

 ence. 



Again, the adoption by two widely dis 

 tinct and perhaps originally antagonistic 

 species of a commensal or symbiotic 

 life, based on the mutual-aid principle- 

 thousands of such cases are familiar to 

 naturalists would ameliorate or abolish 

 the inter-specific struggle between these 

 two species. Even more effective in the 

 modification of the influence due to a bit 

 ter struggle for existence, is the adoption 

 by a species of a social or communistic 

 mode of existence so far as its own in 

 dividuals are concerned. This, of course, 

 would largely ameliorate for that species 

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