FATALISM OR FREEDOM 



in a last analysis from inorganic nature, 

 that the forms of their expression in living 

 bodies are shaped to a large extent by the 

 organization of these bodies, and that the 

 amplification of these mechanisms of con- 

 trol is perhaps the most significant factor 

 in animal evolution. Control of human 

 behavior is largely through mental power 

 and this, as the man on the street correctly 

 expresses it, is brain power. In the actual 

 operation of all these systems of control, 

 from ameba to man, they conform to the 

 natural laws of biology, that is, they are 

 all functions of specific structures related 

 in causal sequence and hence mechanisti- 

 cally determined and mechanistically de- 

 termining events. The more perfect the 

 control, the more elaborate and efficient 

 the mechanism. 



There is abundant scientific evidence, 

 which cannot be reviewed here, that think- 

 ing is a function of the body (and of the 

 brain more particularly) just as truly as 

 walking is a function of the body (and of 

 the legs more particularly) . Both of these 

 functions have well-known, definitely as- 

 signable organs, and the scientific evidence 

 for relating the function with the organ 

 is of the same sort and is equally con- 

 vincing in the two cases. 



[40] 



