SCIENCE AND REVOLUTION 



directly connected with the central nerve system, 

 and through this system with the heart, the 

 lungs, the liver, the stomach, with the muscles, 

 the connective tissue, the bony skeleton, etc. The 

 physical brain, and the other physical parts of 

 the human body, constitute the individual man 

 with whom I am here dealing. And this indi- 

 vidual, and all his fellow-men, are the collective 

 man whose conquest of his environment I under- 

 take to study. Only this natural man and no 

 other. 



Now, what is the environment which this nat- 

 ural man is to conquer? In explaining this I 

 must mention a few things which may seem triv- 

 ial. But there is nothing that is trivial in this 

 study except the things which science cannot 

 grasp by inductive and analytical methods. The 

 most trivial things in the environment of man 

 have a greater influence than most of us realize. 



Man's environment, then, consists of the clothes 

 that cover his skin. The house in which he lives 

 and its furniture and fittings. The food that 

 sustains him. The other men, women and chil- 

 dren that live around him. Further, the village, 

 town, or city, where his house stands, and all the 

 inhabitants and their houses in the same locality. 

 Then the county, state, nation, with their entire 



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