I am inclined to say the real problem is that smart people don’t have kids. But we’ll probably figure out how to make all babies intelligent before that becomes a problem. Incidentally, the problem you mention will also be solved in the same way.

genuine question - what do you mean by smart people? High IQ? Deep knowledge about mankind's place in the Universe / natural order? or their ability to maximise their own personal happiness over their lifetime? If the last point, then personal experience would suggest that having kids makes you happier person (once they are sleeping through the night)YMMV

Probably a high 'g factor' ( https://en.wikipedia.org/wiki/G_factor_(psychometrics) ).

High IQ.

The criticisms section in the Fertility and intelligence article on Wikipedia is interesting https://en.m.wikipedia.org/wiki/Fertility_and_intelligence#C...