246 EVOLUTION 



all-sufficient spring of action, and which 

 naturalists too long and too uncritically 

 adopted from these (whence Huxley's 

 " gladiator's show "), turns out to be en- 

 lightened by family interest, species interest, 

 however sub-conscious. The traditional 

 primary insistence upon the individual com- 

 petition for food, and the very subordinate 

 and tardy recognition of the importance of 

 sexual and social co-operation, are also trace- 

 able to a confusion of thought that of put- 

 ting the nutritive factor " in the first place " 

 because it precedes the reproductive in 

 time; whereas the organism enters upon re- 

 production, and so cedes the preponderance^ 

 " the first place," to the species-regarding 

 functions. That increase of the reproductive 

 sacrifice which first makes the mammal, and 

 then marks each of its distinctive uplifts of 

 further progress (from monotreme to mar- 

 supial, and thence to placental), that increase 

 of parental care, that frequent appearance 

 of sociality and co-operation which, even in 

 its rudest forms, so surely secures the success 

 of the species attaining it, be it mammal or 

 bird, insect or even worm all these survivals 

 of the truly fittest, through love and sacrifice, 

 sociability and co-operation simple to complex 

 need far other prominence than they can 



