> It's interesting that we can talk about this in such an objective and rational way when it involves non-human animal species, but when it involves humans this

> It's interesting that we can talk about this in such an objective and rational way when it involves non-human animal species, but when it involves humans this statement suddenly becomes extremely controversial. Because historically people mistook skin color and phrenology and other nonsense for "good genes" and caused grave injustices. The attitudes aren't even fully eliminated and so eugenics is rightly viewed with suspicion. "Breeding" is also the crudest of methods to produce "good" humans because we value relationships and individuals much more than we do cattle or show dogs. Medicine is the proper science to treat disease in humans.