596 Causes and Colrse of Organic Evolution 



manifold and skillful use of the hand-arms in the manner 

 already indicated. By this time also the brain, reflexly stimu- 

 lated, increased, and specialized from reception of abundant 

 and long-continued hand-arm stimuli, had doubtless attained 

 to a fairly high conceptual stage. 



But in stating this one must bear in mind how rapidly and 

 strikingly the chimpanzee Master Link forsook all attempt at 

 quadrupedal progression, and behaved "humanly.'* Against 

 this, however, is the important principle that it had compara- 

 tively suddenly been projected into an environment that was 

 stimulating to aspiration and imitation, whereas amid a crude 

 natural environment the higher anthropoids had slowly and 

 laboriously to prpenviron, to practise, and to select a progres- 

 sively nobler type of living, that is now a heritage of the race. 



Therefore, while the writers named above have traced the 

 evolutionary origin of language in a surprisingly perfect manner, 

 the main instrument in stimulating to this origin was over- 

 looked in its commanding importance. One highly important 

 result however of their studies, has been the clear and scien- 

 tific demonstration that man has gradually advanced from use 

 of a simple language poor in roots and in inflectional expres- 

 sions, to highly complicated spoken and written languages, 

 like the Greek and Latin. But as already emphasized in this 

 chapter such advance suggests increasing brain complexity, 

 due to increased intricacy and complicated character of the 

 hand actions involved. So we reach the position, already 

 briefly outlined in Chapter IV, where cogitic energy is con- 

 sidered to have attained its maximal activity. 



The study of this advancing brain complexity in "the higher 

 animals" and in man, its relation to cogitic energy, and all the 

 phenomena of mind, will concern us in the next chapter. 



But in closing this chapter we might remind the reader that, 

 in some systems of classification, man has been separated from 

 the monkeys, that were all fittingly called Primates, and has 

 been placed in a separate family the Bimanes, than which no 

 better name could have been given. For his two hands have 

 been the collectors of his most complicated environal stimuli; 



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