CONTROL OF HEREDITY: EUGENICS 425 



diet," and not "explain" after his appearance. 

 Can anyone now predict from what kind of 

 ancestral combinations the great scholars, 

 statesmen, men of affairs of the next gener- 

 ation will come? The time may come when it 

 wiU be possible to predict what the chances are 

 that the children of given parents will inherit 

 more or less than average intellectual capacity, 

 but since germinal potentiality is transformed 

 into intellectual ability only as the result of 

 development such a prediction could not be 

 extended to the latter unless the environment 

 as well as the heredity were known. 



Mankind is such a mongrel race, good and 

 bad qualities are so mixed in us, marriage is 

 such a lottery, the distribution of the germinal 

 imits to the different germ cells and the union 

 of particular germ cells in fertilization is so 

 much a matter of chance, the influence; of even 

 bad hereditary units on one another is so un- 

 predictably good or bad as is shown in many 

 hybrids, even the minor influences of environ- 

 ment and education which escape attention are 

 so potent in development, that the chances 

 were infinity to one against any one of us, with 



