ATTITUDES TOWARD HUMAN NATURE 23 



cell of the body, dates back scarce half a century. But already 

 the paths blazed by the pioneers have led to the exploration of 

 great countries. The thyroid gland, the pituitary gland, the 

 adrenal glands, the thymus, the pineal, the sex glands, have 

 yielded secrets. And certain great postulates have been estab- 

 lished. The life of every individual, normal or abnormal, his 

 physical appearance, and his psychic traits, are dominated 

 largely by his internal secretions. All normal as well as ab- 

 normal individuals are classifiable according to the internal 

 secretions which rule in their make-up. Individuals, families, 

 nations and races show definite internal secretion traits, which 

 stamp them with the quality of difference. The internal secretion 

 formula of an individual may, in the future, constitute his meas- 

 urement which will place him accurately in the social system. 



"More and more we are forced to realize that the general form 

 and external appearance of the human body depends, to a large 

 extent, upon the functioning, during the early developmental 

 period, of the endocrine glands. Our stature, the kinds of faces 

 we have, the length of our arms and legs, the shape of the pelvis, 

 the color and consistency of the integument, the quantity and 

 regional location of our subcutaneous fat, the amount and distri- 

 bution of hair on our bodies, the tonicity of our muscles, the 

 sound of the voice, and the size of the larynx, the emotions to 

 which our exterior gives expression. All are to a certain extent 

 iconditioned by the productivity of our glands of internal secre- 

 tion." (Llewellys F. Barker, Johns Hopkins University, 1st 

 President of Association for Study of Internal Secretions.) 



The implications for the statesman, the educator, the voca- 

 lonal expert, the student of the neurotic and of genius, of 

 elinquents, deficients and criminals, the explorers of the excep- 

 tional and the commonplace, the understanding of the poetic and 

 rinetic, base and dull types, as well as of those two master inter- 

 sts of mankind, Sex and War, are manifest. The mystery of 

 he individual, in all his distinct uniqueness, begins to be pene- 

 rated. And so every phase of social life, in which the individual 

 s at bottom the final determinant, must be reviewed in the light 

 f the new knowledge. History may be examined from an en- 

 irely new angle. The biographies of our Heroes of the Past, in 

 he Carlylean sense, will bear reinspection. Even Utopias will 

 ave to be revised. 



The internal secretions constitute and determine much of the 

 lherited powers of the individual and their development. They 



