Are we undermining our own evolution?
biohacker42: We are long past the point of evolution as it applies to all other life.And I don't mean that in some crazy pseudo science way.Consider the human brain. Did you know human infants fall intellectually behind chimpanzees of the same age.Eventually humans overtake but it's several years late, how come?It's because our brains are so huge that we can be born without them getting all mashed up. Our skull plates are flexible and they do to a newborn's brain what would instantly kill an adult.But our brains are adapted to deal with that, we survive and fully recover, catch up to and surpass other great apes.But birth is STILL problematic for us humans, so we invented cesarean section.A medical procedure which was already common by the time Cesar was born.And ever since all the knowledge society can come up with influences who survives.This kind of group level evolution is not unique to us, a lot of social animals have aspects of that  But we're unique in just how much our intellectual innovation matters.Short answer, we're selecting for brains and not much else. 
And that's a good thing.Chimpanzee's have a much better immune system then us, but they're endangered.