COSMIC PHILOSOPHY 



gree of social combination, has been furthered 

 by each advance in social combination, so that 

 the enormous psychical progress achieved since 

 mankind became distinctly human has been 

 mainly dependent upon that increasing hetero- 

 geneity of experience which increasing social 

 integration has supplied. 



But in spite of the fact that the psychical 

 progress achieved since mankind became dis- 

 tinctly human is so much greater in quantity 

 than that which was required to carry it from 

 apehood to manhood, we were led to adopt the 

 Duke of Argyll's suggestion, that the boundary 

 was really crossed when this preliminary and 

 less conspicuous psychical progress had been 

 achieved. And working out the happy thought 

 which science owes to Mr. Wallace, we con- 

 cluded that this comparatively inconspicuous 

 but all-essential step in psychical progress was 

 taken when the intelligence of the progenitors 

 of mankind had reached the point where a slight 

 increase in representative capacity came to be 

 of greater utility to the species than any practi- 

 cable variation in bodily structure. Here our 

 first line of inquiry ended. So far as the mere 

 subordination of physical to psychical modifica- 

 tion is concerned, the character of the progress 

 from apehood to manhood now became intelli- 

 gible. 



But at this point we were confronted with a 



156 



