Yeah, I was thinking about how people put so much effort into keeping alive those who would otherwise have died before age three if they had to be out fighting for survival. There are some people that can't even go out in the sun without risking death. We've grown to the point where we no longer have to adapt to suit the environment; we can adapt the environment to suit us. What do you think will become of this?
This subject came to mind when I was re-watching Elfen Lied (awesome anime, if you're into that), and I thought about how the Diclonius were said to be the "next stage in human evolution", and that they "could end humanity as we know it". I was thinking that even though it will most likely not reach the scale of killer psychic powers, there might be some violent, powerful adaptation in humans (come to think of it, Akira explores the same concept) would appear and spread, while those weak who are allowed to survive and reproduce become more and more abundant. This will lead to a society fill with fragile people. Such a mutation, Diclonius level or below, would easily cause humanity to crumble, letting letting the new breeds of humans take over. The idea here is that there will be a force that not only resists human survival and reproduction, but one that attacks it directly, and that it will most likely rise from humans themselves.