HilbertSpace's comment is intelligent, well thought out, and well stated. Of course, I could say the same of any of his posts.
Natural selection is the process of, well, letting nature select. If I see an infant who's mother is physiologically unable to feed it, my impulse is to get the child fed somehow, and I'm appalled at the idea of letting it die. I believe this would also be the reaction of most humans. That being the case, natural selection then chooses life for the child.
History has seen its share of tyrants who have used evolution as an excuse for their atrocities. I see them as every bit as silly as the tyrants that use religion. In either case, nature or god(s) (depending on the ideology being claimed) doesn't need them to shape humanity to some vision. It/he/she/whatever has it within its means to do that without them.