"I disagree with the notion that plentiful food has anything to do with longevity. The fewer calories a person consumes over their lifetime, the higher the probability that they will live a longer life"
This most certainly needs to be qualified. Obviously the quality of the food consumed is also a criterion. With abundance and plentiful food comes choice as well, and being able to choose the quality of calories. That must have something to do with longevity. You don't live long or well on, as an example ,just white rice.
Those who don't have choices or abundance would disagree with you.
Travel is fatal to prejudice, bigotry, and narrow-mindedness. - Mark Twain