FACTS AND FACTORS OF DEVELOPMENT 49 



incidental results; on the other hand are those 

 who maintain that function is the cause of 

 structure and that the problem of evolution 

 or development is the change which takes place 

 in functions and habits, these changes causing 

 corresponding transformations of structure. 

 Among adherents of the former view may be 

 classed many morphologists and Neo-Darwin- 

 ians; among proponents of the latter, many 

 physiologists and Neo-Lamarckians. It seems 

 to me that the defenders of each of these views 

 fail to recognize the essential unity of the en- 

 tire organism, structure as well as function; 

 that neither of these is the cause of the other, 

 though each may modify or condition the other, 

 but that they are two aspects of one common 

 thing, viz., organization. In the same way I 

 think that the body or brain is not the cause 

 of mind, nor mind the cause of body or brain, 

 but that both are inherent in one common or- 

 ganization or individuality. 



In asserting that the mind develops from 

 the germ as the body does, no attempt is made 

 to explain the fundamental properties of body 

 or mind. As the structures of the body may 



