His suggestion seems to be to stop trying, but this is far from obvious. One possible explanation of aging is that natural selection forces living organisms to

His suggestion seems to be to stop trying, but this is far from obvious. One possible explanation of aging is that natural selection forces living organisms to die if they are no longer capable of reproduction or compete for resources with those who can reproduce. For modern human the right balance was determined by evolution hundreds of thousands years ago in a very different environment. We do not know yet which age is now sustainable for nature, but we are powerful enough to adjust the environment, thus natural constraints of human age shall no longer apply. But the selection criteria can give us a hint on what science must focus on to reach longevity: it is female well-being, female fertility age and aging processes that increase competition for resources (i.e. keeping people at work as much as possible). Of course, if we are going to reproduce and live longer, we also need to develop sustainable economy and use resources of our planet wisely.