I disagree entirely. Eugenics is rationally sound, and certainly does not depend on evolution or Darwinism for its basis. It depends only on a belief in human genetic variability. For example, you could have a eugenic program to improve eyesight, or any number of other traits. I don't think it can be denied that eyesight has degenerated in the human population by "regression towards the mean" due to artificial amelioration of the results of poor phenotypical outcomes, and the social acceptance of these efforts - i.e. the continued sexual fitness of the recipients thereof.
The big hit on eugenics is the offense it gives to our moral sensibilities. We are not willing to "harden our hearts" against those, such as myself, with poor eyesight in favor of the abstract notion of an improved race.
clever