148 Determinate Evolution 



them both. Wallace and Hudson have pointed out the wide 

 operation of imitation in carrying on the habits of certain 

 species ; Weismann shows the importance of tradition as 

 against Spencer's claim that mental gains are inherited ; 

 Lloyd Morgan has observed in great detail the action of 

 social transmission in actually keeping young fowls alive 

 and so allowing the perpetuation of the species, and Wesley 

 Mills has shown the imperfection of instinct in many cases, 

 with the accompanying dependence of the creatures upon 

 social, imitative, and intelligent action. 



Second, it gives a transition from animal to human 

 organization, and from biological to social evolution, which 

 does not involve a break in the chain of influences already 

 present in all the evolution of life. 



