HUMAN LIFE 



commonness of capacity and behavior. 

 And so the biologist in his approach to 

 man as a subject of scientific scrutiny is 

 deeply interested in the possible unravel- 

 ing of the tangled and broken skein of 

 his biological history. Whence and how 

 has he come into being? And into being 

 in the particular form and condition 

 which now characterize him? Can human 

 characteristics be found in less complex 

 stage of development and organization 

 elsewhere in the world of life? And if the 

 human body shows no radical qualitative 

 differences from other animal bodies what 

 will be the significance of this to the 

 biologist in his attempt to study and 

 appraise human life? 



As to human origin the biologist finds 

 no tangible evidence to support any other 

 explanation than the now familiar and 

 widely-accepted one of evolution from 

 pre-existing lower animal kinds. For this 

 explanation he does find what is, to him, 

 practically convincing evidence. It is of 

 no very great interest, certainly of no 

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