EVOLUTION IN POSSE 235 



gift of speech ; we know that a slight difference in 

 physical conditions during sleep causes an enormous 

 difference in the mental functions ; we know that 

 a few drops of morphia in the blood completely 

 alters a man's character ; and knowing these things, 

 it is impossible to doubt that the difference (which 

 undoubtedly subsisted) in the number and arrange- 

 ment of the brain-cells in different individuals 

 must mean very great differences in their mental 

 processes, and in their apprehension of the so- 

 called objective world. A considerable percentage 

 of the population are colour-blind, and it is prob- 

 able that perception of some of the colours has 

 been acquired in comparatively recent years. 



Henry James, the great American psychologist, 

 says : "The Object which the numerous inpouring 

 currents of the baby bring to his consciousness is 

 one big, blooming, buzzing Confusion. That 

 confusion is the baby's universe. ..." And 

 there can be no doubt that there are many big 

 babies in the world, and that most of us are babies 

 compared with great minds. It is probably hardly 

 an exaggeration to say that there is not one world, 

 but as many worlds as there are minds. 



The difference, then, between man and man and 

 woman and woman is very great, and there is great 

 scope for selective evolution, and great possibility 

 for further differentiation. It is possible, almost 



