SEPARATION OF SEXES 105 



at the same time does their color make concealment 

 easy for them, when in the foliage of their natural 

 habitats. In no way are there any parallelisms 

 between their condition and that of the dangers and 

 disabilities of the child-bearing human female. 



To sum up the argument: the perils and dis- 

 advantages resulting from the upright attitude would 

 have determined the struggle for existence against 

 the survival of man, if his superior intelligence had 

 not initiated various modes of conduct, competent 

 to balance, partly balance, or more than balance, 

 the physical advantages possessed by his competitors 

 and enemies. None of these modes, however, al- 

 though useful to other members of the race, could 

 be made available for the pregnant females. There 

 remained, to them, therefore, but the one saving 

 resource of continued concealment. However, as 

 no kind of creature can escape extinction unless its 

 pregnant females are preserved, and since the human 

 race has survived, therefore, the conclusion is justi- 

 fied that at a very early stage in the existence of our 

 race the females acquired the habit of concealing 

 themselves during a part of the period of pregnancy, 

 and that this was one of the means by which the 

 race escaped extinction. 



A point has been reached here, where a differentia- 

 tion in habits and activities on the sex line may be 

 looked for, because the males had no occasion to 

 practice self -concealment, but could continue active 

 lives in the open. 



