What about the Okinawans? | Melissa McEwen on food anthropology, economics, and culture
"In a study of Japanese migrants in the United States the cultural upbringing was the strongest predictor of coronary heart disease. Those who were brought up in a non-Japanese fashion but preferred the lean Japanese food had a heart attack almost twice as often as those who were brought up in the Japanese way but preferred fatty American food.4"
Not to mention the Okinawans have a genetic variation that helps greatly in their longevity.
Hey while your picking random societies why not look at the hundreds of hunter gatherer tribes cataloged who eat an average of 70-85% of their calories from "hunted" animals. None of them suffer any diseases of civilization either, and given that we are talking hundreds of societies rather than one particular group its highly unlikely that there are genetic causes for their good health.
I was just gonna say good luck and leave you to your thing, but since you evoked the "maybe we..." thing I don't feel to bad setting things straight
But still good luck to ya!