ive been here since 2014. i didnt bring up eugenics, but if you want to broach that topic then fine. intelligence, as well as all other traits or characteristics, of not just humans but all organisms, is subject to natural selection. if you deny this, you deny natural selection and this would make you a science denier. whether we should act on this fact, or the morality of doing so, is completely up to you. but you will not deny science on hackernews.

oh and you saw my comment at the top because the ranking algorithm takes the youthfulness of the comment into account. its rather embarrassing that you dont know this.