CHAPTER VIII 



DIFFERENTIATION OF SEXES IN CHARACTER AND THEIR 

 MENTAL AND ESTHETIC COMPLEMENTARINESS 



On comparing the males and females of any of the 

 higher mammalian genera, except man, with each 

 other, there is discovered a broad sameness in the 

 somatic structures and functions not related to repro- 

 duction, and an equal fitness of both sexes for the 

 various activities demanded by the average exigen- 

 cies of race life. This fitness is but slightly impaired 

 for the females, during a very brief period, just before 

 and after giving birth to the young. 



In the human race, however, physical uprightness 

 has produced a very different state of affairs. By 

 enforcing, during periods of varying length, a separa- 

 tion of the sexes, it has initiated in them a divergence 

 of activities and habits in opposite directions, which 

 through natural selection has resulted in a differen- 

 tiation of characters along the sex line. For, seeking 

 food to support themselves, their females, and young, 

 the men could not remain in the security of the 

 places where the former were concealed, but had to 

 come forth into the open to meet the hardships and 

 dangers of the struggle for existence, by fierce self- 

 seeking activities, including the battling with power- 



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