Originally Posted by
jomoru
Many cultures did apply eugenics historically, see the spartans for example. It gained special appeal in the 19th century as a means of Scientifically improving humanity. It only fell out of favor in the west because of Nazis. Even then traditional marriages in many cultures are built around the idea of "best matches"
This isn't to say Eugenics hasn't proven to be fairly horrible, but then so has war, plunder, conquest and we tend to consider these "civilized" persuits.