io6 TABOO AND GENETICS 



the same strong parental instinct. The stocks 

 more poorly endowed with this impulse will 

 tend to die out by the very lack of any tendency 

 to self-perpetuation. It is only logical to con- 

 clude, therefore, that as we set up the new forces 

 of social control outlined in this chapter, we are 

 at the same time providing more scope for 

 natural selection, and that the problem of aber- 

 rant types consequently becomes only a 

 transitory one. 



I 



