HUMAN LIFE 

 AS THE BIOLOGIST SEES IT 



i 



INTRODUCTORY 



WHILE engaged in the work of Mr. 

 Hoover's relief organizations I saw a good 

 deal at very close range of the behavior of 

 men at war. I saw a constant struggle 

 in the case of some of these men in posi- 

 tions of authority between two elements 

 in their make-up; a brute element inherent 

 in them as a biologically inherited ves- 

 tige of prehistoric days, and a strictly 

 human element more recently acquired 

 and transmitted to them by education 

 and social inheritance. Sometimes one ele- 

 ment dictated their behavior, sometimes 

 the other. Sometimes, unfortunately, 

 the element of education reinforced the 

 element of brute inheritance. The exist- 

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