BRAIN: 



A STILL PROGRESSIVE TISSUE OF THE 

 HUMAN ORGANISM. 



^1 7HETHER a higher type of life will enventually 

 * ^ develop from humanity, whether, indeed, the 

 human organism is capable of being greatly improved, was 

 one of those questions which early suggested themselves 

 to biologists of the Darwin era. 



The argument and the inference from evolution was, in 

 a word, that man as found on the earth is the long- 

 descended heir of the developmental effort, — the effort of 

 living matter in the cell mode of existence to improve its 

 condition and rise to the highest possible degree of intelli- 

 gence and happiness. On a priori grounds, there would 

 seem to be no good reason to infer that a struggle extend- 

 ing through millions of years, and involving so much of 

 individual sacrifice, may not eventuate in a correspond- 

 ingly grand future achievement. Evolution, in fact, 

 naturally ushers in a moral and a creed concerning man's 

 past and his future. 



As to the further progress of the human organism, how- 

 ever, there are many indications which appear to contro- 



