I suspect there's a population whose base state better matches the factory food society we live in. And I'm not talking about McDonald's. I mean the vast majority of the foods we eat are monoculture. Our bodies did not evolve in a monoculture. They evolved with variety and some thrive with one kind of food other side with another kind of food.

And then there's the amount of food we have available to us. In the West we are so crazy wealthy, especially regarding food. Hunter-gatherer societies and, I suspect, even farmers for most of the time we've been living with agriculture, did not have access to this much food.

*This much monoculture food.*

The fact that neither of these is what our bodies evolved to eat can't be healthy.

I guess we won't starve so we've got that going for us.