VI. 



Lengthening of Infancy, and Concomitant 

 Increase of Brain-Surface. 



HE first appearance of infancy in 

 the animal world thus heralded 

 the new era which was to be 

 crowned by the development of Man. 

 With the beginnings of infancy there 

 came the first dawning of a conscious life 

 similar in nature to the conscious life of 

 human beings, and there came, moreover, 

 on the part of parents, the beginning of 

 feelings and actions not purely self-regard- 

 ing. But still more, the period of infancy 

 was a period of plasticity. The career of 

 each individual being no longer wholly pre- 

 determined by the careers of its ancestors, 

 it began to become teachable. Individual- 

 ity of character also became possible at 

 the same time, and for the same reason. 



