|  | Positive
feedback increases deviation from equilibrium.Civilization includes positive feedback between population, intensity of
production, and organization.  Each of these elements reinforce the
others.  This creates a vicious cycle.As population ↑, intensity ↑As intensity ↑, demand for administration ↑
 As administration ↑, intensity ↑
 As intensity ↑, population ↑
The result is that civilizations should rise with great speed but should
also be inherently unstable.  |