SUMMARY 183 



drift of the forces and materials of the universe 

 into a definite direction towards the attainment of 

 the purest and highest ideals of truth, justice, 

 beauty, and happiness, although up to this present 

 age this tendency has been desperately hindered by 

 the predominance of the false type in nearly all 

 human affairs. 



To this extent have the expectations held out 

 by the title been fulfilled: mental, moral, social, 

 economic, and rudimentarily political conditions, 

 which are among the constituents of civilization, 

 have been traced to two anatomical modifications. 

 Possible doubts whether the more complex modern 

 phenomena, belonging to these same categories, 

 are likewise indirectly traceable to these same 

 anatomical modifications should be removed from 

 rational minds on remembering that these complex 

 modern conditions could not possibly be just as 

 they are to-day unless the conditions preceding 

 them, which have in these pages been traced to 

 these anatomical modifications, had been just as 

 herein traced. 



To show this in detail for these modem condi- 

 tions belongs to works on the recent phases in the 

 development of civilization, and not to an essay on 

 its physical basis. 



Here, then, excepting only the important supple- 

 mental matter contained in Appendix Notes, this 

 work comes properly to an end. 



Feelings, emotions, sentiments which naturally in 



