People assured other posters that it was possible that people past the reproductive age can have a possitive effect on the survival of 'their respective' groups. Is this true? and it is reverse also true. I posted the following in a different forum: I didn't get any satisfying answers there, but I am sure we can do better Please Register or Log in to view the hidden image! So is it really possible to be under the influence of natural selection past your reproductive age?