>> “I think the long lived people are the ones with the genes they inherited from their long lived ancestors.” <<
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As I noted above, that has not proven out to be so. When they come here and eat our diet, and go to our doctors, they quickly begin to die younger.
I am not talking about the people who come here from other cultures, I am talking about the ones who are here and have been here for many many generations. Some families are longer living than others. For instance, my husband is 75 and no one in his family has ever lived that long before. My family on the other hand, almost everyone lives to be very very old.
Our diet makes for taller Japanese than the Japanese that don't immigrate...also the diet tends to result in certain types of cancer...
Japanese eat much more fish than we do and we eat much more meat than they do..