> I think this shows that in species where the male does not die promptly after mating, there is good reason to live longer Yep. Parenthood. And for humans (

> I think this shows that in species where the male does not die promptly after mating, there is good reason to live longer Yep. Parenthood. And for humans (and other social species like elephants, other primates, etc.) to be grandparents. Humans have a particularly long juvenile period, which they need care of parents and cannot reproduce. The reason humans still die, of course, is so that resources aren't wasted on bodies that take more and more energy to keep alive and healthy, which ultimately comes back to entropy.