I was speaking primarily about modern day and the future, not antiquity. Though that paper makes some difficult-to-verify claims. It might be less a result of

I was speaking primarily about modern day and the future, not antiquity. Though that paper makes some difficult-to-verify claims. It might be less a result of the diet's intrinsic problems and more a result of evolutionary pressures favoring dumber people, because work is much easier, so investing in intellect wastes energy that could be spent on other things.