INTELLIGENCE, POWER, 



from 91 to 630 per cent higher than the brain-to-body- 

 weight ratio in adults of the same species: in juvenile wild 

 animals the brain-to-body-weight ratio was from 6 to 221 

 per cent higher than the brain-to-body-weight ratio in the 

 adults of the same species. In humans the brain-to-body- 

 weight ratio of the newborn is 560 per cent higher than the 

 brain-to-body-weight ratio in adults; in a child of ten 

 years it is 250 per cent higher than in an adult; and in an 

 adolescent of fifteen years it is 160 per cent higher. Thus 

 the anatomical characteristic of the fetus, the infant, and 

 the child is the relatively large size of the brain and the 

 adrenal glands. This also is the formula of the fetus, the 

 infant, and the juvenile wild animal. 



The gift of evolution to man by which man has achieved 

 his dominance in the world is the thyroid gland and the 

 brain, with its large and infinitely delicate matrix, in which 

 are written the action patterns that guide and govern him. 



Not only is the brain of man characterized by the greater 

 mass of recording matrix, but almost as significant, lying at 

 the very basis of training and education, is the fact that 

 in the case of the lower animals the available recording 

 matrix has all or nearly all its recordable capacity filled 

 with simple animal action patterns at the time of birth, 

 and there is but a small amount of blank matrix upon which 

 stimuli after birth may be recorded. This would appear to be 

 the physical reason why animals can be trained and edu- 

 cated to but a limited degree. During human fetal life only 

 the patterns of our wild ancestors are established in the 

 matrix of the brain. None of the patterns of actions of 

 man's civilized state is established in fetal life. In the 

 process of procreation man and other animals differ funda- 

 mentally in the amount of recordable matrix that each 

 brings from one generation to the next generation across 

 the protoplasmic bridge. The bird comes over the proto- 

 plasmic bridge with almost all of its action patterns 

 established in its governing matrix. The infant comes over 



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