AND PERSONALITY 



represented greater difficulties; therefore greater intelli- 

 gence was required and the more intelligent ape survived; 

 so the thinking brain and the thyroid gland became a little 

 larger and the adrenal glands a little smaller. Thus, slowly, 

 a more intelligent ape, with a larger thyroid gland and a 

 manipulative hand, came into being, one that used a stick 

 and stone, that lived in groups for common defense. 

 Could one place, hand in hand, five hundred of one's 

 ancestors, allotting one hundred years to each, the last 

 hand would be that of a hardy ancestor, guarding the 

 entrance of his cave against the leopard and the snake. 

 That dawn man, our remote ancestor, followed the herds 

 that his intelligence finally controlled. That dawn man 

 used the club and the arrow; he found fruits and nuts 

 and birds' eggs and wild grain; he hunted and fished; he 

 fashioned skins to keep himself warm; he found shelter 

 in caves; he discovered the control of fire; he tamed the 

 wolf puppy to be his companion the dog; he made dugouts 

 and navigated the streams. 



Today, as in the long yesterday, man hunts and fishes, 

 finds fruit and nuts, and lives upon the flesh of animals, 

 milk, eggs, honey, and grains. Today the brain of think- 

 ing, working man is so highly organized, so hourly taxed, that 

 there are more institutional beds in the United States for 

 adults suffering from mental and nervous diseases than 

 there are for adults suffering from general diseases, and 

 vast numbers of the so-called "general" diseases are due to 

 the abnormal activity that is the result of inheritance 

 through the mutations of the brain, the thyroid gland and 

 the adrenal sympathetic system. 



The mind of civilized man is a very powerful instrument. 

 Its power is that of the switch that explodes the mine. The 

 mind of man has transformed the animate and inanimate 

 earth. It has multiplied, cajoled, and glorified man. It has 

 protected man against many diseases, against cold, against 

 hunger, against wild animals; it has enslaved animals and 



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