Most of my female ancestors lived to be in their 80s. One lived into her 90s. I have always supposed that this would mean I would live into my 80s or longer.
In an article that reminded me of Heinlein’s Lazarus Long , Live Science says that a longevity gene also gives good brain power.
That’s good. We would not want Jonathon Swift’s Strulbruggs hanging around. I would prefer to live as long as my mind was reasonably good (if I wanted it to be great, I’d be gone about eight years ago) and then leave.