CHAPTER VI 



THE DEVELOPING PERIOD 



The practical problem of evolution consists in 

 regulating biological heredity as far as possible 

 and then in trying to produce conditions that 

 will enable social heredity to act to the best ad- 

 vantage. 



This must start with an inquiry as to the 

 usual physical and mental characteristics that 

 go with a good heredity, biological or social, or 

 both. In other words, what may be considered 

 an average normal condition for the infant 

 and growing child? In this way we may de- 

 termine, at least, whether a favorable social 

 heredity is present in each case. We cannot 

 alter biological heredity, but we can and should 

 aim to correct a faulty social heredity if such 

 exists. The latter may be shown by physical 

 or mental under-development. 



S8 



