^^'^l ZOOGENESIS "^i 



therefore that the details of man's structure and his 

 mentality are, and always have been, man's alone. 



Reflections. — The two chief features wh.ch distin- 

 guish man from all the other mammals are his ex- 

 tremely flexible and useful hand, and his unique family 

 relationships. Human children follow each other so 

 very closely that the second appears before the first 

 is independent of the parents, the third follows the 

 second in the same way, and so on. Other distinc- 

 tive attributes are the use of fashioned or manufac- 

 tured tools, the use of fire, the use of clothing and of 

 ornaments, and the use of articulate speech, which 

 enables man to accumulate inowledge in successive 

 generations. Is there any relation between these 

 several different types of attributes? 



The flexible and adaptable hand of man lends itself 

 naturally to the use, as implements or weapons, of 

 various natural objects, such as sticks and stones. 

 From this it is but a step to the manufacture and the 

 use of tools. 



The use of tools leads naturally to developments in 

 three directions. In the first place, it is unlikely that 

 any creature possessing the strength of man could use 

 tools long without striking sparks and thus discover- 

 ing the possibilities of fire. In the second place, the 

 use of tools would lead to the manufacture and the 

 use of clothing and of ornaments. In the third 

 place, the use of tools permits the construction of a 

 fixed abode or domicile wherein man would be safe 

 from at least the majority of his four-footed enemies. 



Such an abode would presumably become the abid- 



