THE SPIRITUAL WORLD. 103 



ment to the probable operation of sexual selec- 

 tion (in Darwin's sense) in furthering its dis- 

 appearance. Greater brain development has 

 allowed the luxury of sexual selection to 

 operate without fatal results to the race. In 

 any case, the greater the brain power, the less 

 the necessity of a hairy covering. Nay, the 

 progress of a hairless race has been brought 

 about by the very needs of clothing and shelter 

 adapted to varying circumstances, but only 

 where these needs could be met because of 

 greater brain development. Thus the diffi- 

 culties raised by Mr. Wallace with regard to 

 these two differences between man and the 

 animals taken separately, disappear when they 

 are taken together. 



Mr. Wallace himself 1 argues that the power 

 possessed by savages of travelling through 

 trackless forests comes not from instinct but 

 from the use of the perceptive and reasoning 

 faculties. Does not that imply the require- 

 ment of very considerable brain power ? The 

 civilised man uses his slightly greater brain 

 power in many different ways, and therefore 

 fails where the savage succeeds, his observa- 

 1 Contributions to the Theory of Natural Selection, p. 207. 



