214 



SOCIAL EVOLUTION 



blacks with long heads and kinky hair, blending off in 

 Africa to the Polynesian type from inter-breeding. All 

 this agrees with our original hypothesis. 



For the purposes of our study of social evolution we 

 can dispense with any further examination of the varie- 

 ties of the Australian-African group and of the Asian- 

 American group and can concentrate our attention upon 



ASIA 



AFRICA 



FIGURE GO. Zone of Distribution of Original Undifferentiated Race. 

 (According to Giddings.) 



the varieties of the Polynesian-European group. The 

 European part of this race may be divided into two main 

 divisions. One of these is relatively long-headed and 

 dark-complexioned ; this division has been called the Eur- 

 African group. The other is relatively round-headed, 

 light-complexioned, and inhabits Europe west of the Ural 



