COSMIC PHILOSOPHY 



of intellectual progress thus illustrated and that 

 in which an unlimited capacity for generaliza- 

 tion produces such words as " individuation " 

 or " equilibration," the contrast is sufficiently 

 obvious — and it fully confirms our theorem 

 that the amount of intellectual progress achieved 

 since man became human far exceeds that which 

 was needed to transfer him from apehood to 

 manhood. 



The increase of the correspondence in com- 

 plexity, already illustrated incidentally in the 

 treatment of these other aspects of the case, is 

 still further exemplified in the growing compli- 

 cation of the interdependence between science 

 and the arts. When tracing the complexity of 

 correspondence through the lower stages of the 

 evolution of intelligence in the animal kingdom, 

 Mr. Spencer hints that the evolution of the 

 executive faculties displayed in the organs of • 

 prehension and locomotion is closely related to 

 that of the directive faculties displayed in the 

 cephalic ganglia and in the organs of sense. 

 The parallelism may be summed up in the 

 statement that in most, if not all, the princi- 

 pal classes of the animal kingdom, the animals 

 with the most perfect prehensile organs are the 

 most intelligent. Thus the cuttle-fish is the 

 most intelligent of mollusks, and the crab sim- 

 ilarly stands at the head of crustaceans, while 

 the parrot outranks all other birds alike in sa- 



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