hmm I guess that explains why creationists tend to be pro-life and evolutionists tend to support abortion
hmmm.. I guess you would be dead wrong on that one.
If you read Darwin you may see that he didn't think strict biological natural selection was important for us. He thought that social cohesiveness, regardless of physical traits, is what makes one society stronger than another. Specifically, he wrote about "sympathy." The more sympathetic society, the one that helps the weakest among it, will be more socially cohesive and thus will be stronger in the long run.
It's pretty much a direct argument against abortion and eugenics.
For an example, just look at the Christian world. Christian societies are much more sympathetic overall than Muslim ones, and if it weren't for the freak accident of sitting on a gold mine of oil, the Muslim world would still be globally irrelevant. Yet we're not physically superior to them, only socially.