it will happen one day. a long time from now, it will happen.
Technology and governments will rise to a better level, and it will drag the population with it, kicking and screaming if it has to.
All you have to do is provide children with better parents. A better educated populace with less stress levels, with a higher quality of life, technology providing wondrous methods for food, energy consumption, etc...
will produce better parents. and in turn, better children, smarter and wiser at a younger age than the previous generation.
or, you can do what Hitler did, and try to eradicate a people all at once, but that's a no no.