Eugenics has the same problem that censorship has.  Just like with speech where we can't answer the question "who gets to decide what is and isn't true?" neither can we answer the question "who gets to decide what is and isn't bred into the next generation?" (well, we can decide for our family, but not for others)  None of us is wise enough to answer that, even if we understand the general principle that suspending natural selection must be weakening us.

I predict within 200 years A.I. will perform eugenics on us.