Well, there are obvious limits to that argument. Even a hundred years ago, it was common to die in your 60s. Taking on a new career or new relationship at the a

Well, there are obvious limits to that argument. Even a hundred years ago, it was common to die in your 60s. Taking on a new career or new relationship at the age of 60 would be ridiculous. Today, it's still a bit unusual but not unheard of. Given a longer life, I think we would come up with new ways to motivate ourselves, and new challenges. This isn't an insoluble problem, it's a business opportunity for Tony Robbins. That said I'm not sure a human being could ever fully escape ennui, so maybe there is some upper limit. I don't think 80 years is even close though.