Strongly disagree. People jump to that when they see a healthy society that's relatively homogeneous, and ignore counterexamples like relatively homogeneous cou

Strongly disagree. People jump to that when they see a healthy society that's relatively homogeneous, and ignore counterexamples like relatively homogeneous countries, or states within countries, that have poor education/healthcare/etc. It's a post-facto explanation with no predictive power, and people jump to it only because it's superficially obvious.