158 Heredity and Social Progress 



other katabolic. In woman the outer body is 

 anabolic, the inner is katabolic; in men the 

 opposite is true. The well-known mental pecu- 

 liarities of the sexes correspond to this differ- 

 ence: men are good thinkers, that is, innerly 

 anabolic; while women are quick in decision; 

 that is, innerly katabolic. If the metabolic 

 changes back of thought come quick and 

 strong, decision is prompt and accurate. If 

 they are slow, attention and analysis are good, 

 but action is less effective. 



The word "emotion," so often used in an 

 indefinite way, is used by me as the index of 

 bodily changes. When defined in this way 

 pleasure is not an emotion but an alternating 

 discharge of surplus energy and is therefore 

 to be associated with growth. We find pleas- 

 ure in the causes that create growth, and emo- 

 tion in the adverse elements which, reducing 

 the organism, permit regeneration. 



Viewed organically there are three funda- 

 mental processes growth, devolution, and re- 

 generation. Organisms grow under favorable 

 conditions. They devolve towards their undif- 

 ferentiated beginnings under adverse condi- 



