THE CONSUMING POPULATIONS 201 



nomads and semi-nomads, largety self-contained in the matter of 

 food supplies, whose per capita consumption of animal foodstuffs 

 may be relatively high. Any advance towards a more advanced 

 stage of development and standard of living among them, while 

 possibly involving an increase in their total consumption of animal 

 foodstuffs, is likely at the same time to result in, if it does not indeed 

 result from, an increase in the surplus quantities of animal pro- 

 ducts such as wool, skin, hides, and perhaps even foodstuffs, avail- 

 able for exchange trade with the rest of the world. 



