HUMAN LIFE 



normal man who married the feeble- 

 minded woman and started a line of 

 descendants of whom four out of five were 

 socially incompetent and hence burdens 

 and dangers to society, and then married 

 a normal woman and started another 

 line of descendants all socially competent, 

 should have been prevented from making 

 the first mating. Don't call this eugenics ; 

 call it an application of scientific knowl- 

 edge and common sense. Think of it as 

 just as important and just as possible as 

 the enforced isolation of a victim of in- 

 fectious disease, or of homicidal mania. 

 But not all the problems of human life 

 in the discussion of which the biologist 

 ventures to take part exhibit so clearly 

 as the examples thus far referred to, their 

 biological aspects. The approach of the 

 biologist to these other problems, even 

 his right to approach them, becomes 

 more debatable but for that very rea- 

 son, perhaps, more interesting. Can the 

 biologist with his methods of analysis 

 and his knowledge of other kinds of life 

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