From William M Montante:

Re: Societies evolve a bit like organisms, study finds (Oct. 13): This makes perfect sense if you understand the science of Complexity and evolution.

Complexity is scale-free. It fits to the molecular/ cellular level as well as societal. Just degrees of difference along the same pattern…. small incremental changes over long periods of relative stasis, with that equilibrium infrequently "punctuated" here and there by upheaval (e. g. revolution). Societies, like all organisms and organizations, are complex adaptive systems.