My comment, which I could have stated more clearly, was a contention that people in the northern or southern arctic climes had food sources with much fat, saturated, mono, and poly sources from the animals harvested in those regions during fall and winter. I'm not sure whether people with ancestry closer to the equator would do better with fruit and high carb, but my assumption is that the indigenous people who lived closer to the equator had a different combination of fats available due to the longer growing seasons and adapted well to that. I'm not sure what even constituted high carb in those regions, but I'd wager their macros were very different than a SAD, and they never had to contend with manufactured seed oils.

I do know that none of them far north, south or equatorial had cheese doodles, as the grocery stores were very inconvenient to get to in those days . . . . . and deliveries were out of the question . . . .