LAWS CONTROLLING HUMAN SOCIAL HEREDITY 319 



the prehistoric stone man none will venture to ques- 

 tion. Progress there has been of immense imj)ort. 

 But this progress has been primarily not in the 

 innate powers of man but in his acquired powers. It 

 is civilization that has advanced rather than the 

 man who has made the civilization. A man might, 

 if he lived long enough, heap up treasure for a cen- 

 tury, and at the end of the century he would doubt- 

 less be the possessor of a vastly greater pile of trea- 

 sure than at the end of the first year. With the 

 treasure he could do far greater things than he 

 could have done at the end of his first year of accu- 

 mulation. But he would not necessarily be a stronger 

 or a greater man simply because his j^ile of trea- 

 sure had grown for a hundred years. So the human 

 race has been heaping up treasures of vast utility 

 and has continued to do this for thousands of years. 

 The treasure pile has grown to prodigious size, and 

 with it mankind is capable of far greater achieve- 

 ments than he could accomplish when he began this 

 treasure-heaping. But he is not necessarily a better 

 animal than when he started. The treasure pile 

 which he has heaped up for his use we call civiliza- 

 tion. It has never been a part of his organic nature 

 any more than the miser's gold is a part of himself. 

 It has accumulated by laws of its own. 



How Civilization Develops Intelligence 



Social heredity furnishes the something that is 

 lacking in the understanding of human mental de- 

 velopment. The evolution of mankind has offered 

 many difficulties to the natural selection theory, and 

 even its most strenuous adherents have admitted 

 that there are phases in human evolution that do not 



