GENETICS AND RACE 463 



Pleistocene. This confirms the view that they should be regarded not 

 merely as geographic subspecies or races but as species. 



Prof. F. A. E. Crew. 



The classifications of the anthropologist relate to physical character- 

 istics which, from what we already know of human genetics and by analogy, 

 are in the main genetic characters. This being so, it follows that any 

 classification of man by reference to hereditary characters which disregards 

 principles which the science of genetics has shown to be correct, must 

 necessarily be imperfect. 



The suggestion that in its very early history mankind became divided by 

 isolation, mutation, selection and inbreeding into the equivalent of geo- 

 graphical races or sub-species is in accordance with the demonstrated facts 

 of experimental genetics. But the notion that the mingling of such, conse- 

 quent upon the removal of isolation and inbreeding, leads through blending 

 inheritance to later uniformity, is not. Such constellations of characters 

 have necessarily become broken up and their ingredients shifted back and 

 forth, combined and recombined. 



The techniques of genetics should now be added to those of anthropology 

 and genetic analysis of human differences and the correlations between 

 them should be undertaken. 



