I've had this NYT article open in a browser tab for days and just couldn't close it.
It's by Dan Buettner, the The Blue Zones guy. In spite of his clear bias for plant based and vegetarian-esqe diets, I think the importance of his work is in finding those populations or zones for whom longevity is clearly multi-factoral.
Nope, it's probably not all about a Paleo diet and Crossfit WODs.
I think I'll leave it at that, for once. You really ought to just read the article and see how many likely factors for a nice long life you can uncover...other than a pretty reasonable diet of whole food, and in spite of the fact that it includes some "evil" things.
I've been to Greece a number of times, hit the countryside and have spent time on a small island. This all makes perfect sense to me.