AS THE BIOLOGIST SEES IT 



They think about them in terms of money 

 and trouble and pleasure, and love and 

 hate, and personal hopes and chagrins, 

 which are peculiarly human terms. That 

 is why I repeated so many times in my 

 first lecture, and repeat now again, that 

 we biologists must take into account in all 

 our looking at human life the things 

 that we see at home as well as the things 

 we see in the laboratory. If we do not we 

 overlook the greatest things in the great- 

 est problems of human life, the things 

 that really make human life human. 



But let us turn now to one or two more 

 of those problems which especially involve 

 in their consideration this matter, in- 

 troduced by our reference to the war 

 problem, of the two kinds of inheritance 

 and the relations between them. 



The problem that I have especially 

 in mind at this moment introduces con- 

 spicuously the subject of human heredity. 

 Is a man what he is because he is born so ? 

 or because he becomes so by education, 

 using education in the broad sense of 

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