30 THE INHERITANCE OF ACQUIRED CHARACTERS. 



heritance of reaction tendencies produced by func- 

 tional activity. Determining line of least resistance. 

 May be wholly imaginary, but almost universally 

 taken for granted. Growth of Neo-Lamarckism. 



Civilization the inheritance of the successes of the 

 past. 



"Considering the width and depth of the effects 

 which the acceptance of one or the other of these 

 hypotheses must have on our views of life, the ques- 

 tion, Which of them is true? demands beyond all other 

 questions whatever, the attention of scientific men." 

 Herbert Spencer. 



