How strongly correlated is geography and genetics?For example, will two populations converge to have the same things like dietary preferences, phenotypes, etc. even without interbreeding?The scientific intuition says "No", but scientific intuition is often extremely incorrect about complex dynamic systems. Are there any long-term empirical studies about this? I assume no, because it would have to be conducted over thousands of years in a particularly well controlled environment.But the thought is interesting. It would have huge implications on chaos theory.