Long but interesting article.
I am not suggesting that everyone, at every age, should adopt a Stone-Age diet, as those who embrace the "Paleo" doctrine advocate. We are well-adapted to wheat, rice and corn when we are young and can eat them with impunity. But, I propose, not when we are older. The benefits for most of us will probably not be as dramatic as those for people who have no agricultural ancestry. But even reduced benefits offer the possibility of warming the chilly draughts of death.