> There is a reason to value diversity but it's as far from theoretical as you can get: I'm not sure that's the takeaway. Diversity ensures change and optimiza

> There is a reason to value diversity but it's as far from theoretical as you can get: I'm not sure that's the takeaway. Diversity ensures change and optimization (in a roundabout way). Stability in cultures is about application of optimization and more often, culling. I guess case in point depends on your time frame reference and what you mean by stability. Rome and the Aztecs wiped out almost as much as they assimilated (and assimilation was generally via enslavement, which is not quite the same).