> I don't know of any culture that hasn't practiced eugenics, if only passively.
The US does to this day. Consider: I'm ugly and weird. And the hot wimmins just refuse to breed with me. This is thus eugenics, with the end result of breeding fewer weird ugly people.
That's called female choice. Darwin called it sexual selection.
Doesn't really eliminate ugliness, though. As with the war on terror, the defenders only have to make one mistake.