Rather, increased productivity followed from increasing economic specialization which, in turn, had been produced by a massive increase in the 'density' of society.
As he read the evidence on primitive societies, where of course there was far less economic specialization, social cohesion was of a very rudimentary kind.
The alliance often involves technology transfer (access to knowledge and expertise), economic specialization, shared expenses and shared risk.
These gains from economic specialization are still nothing to sneeze at.
Historians have developed typologies of cities, emphasizing their geographic location and economic specialization.
Adam Smith described economic specialization in his classic work, The Wealth of Nations.
The first project suggested the replacement of the existing nine volosts with six districts, each of which would have a certain economic specialization:
The society was essentially Nyoro in its culture, based on the evidence from pottery, settlement patterns, and economic specialization.
The degree of economic specialization might vary from one centre to another, and in the last resort it is not always easy to define what was a town.