In principle there is a selection pressure against it if it's even 1% genetic. But that pressure might not be strong enough to have a large effect very soon (especially when very few people today seem to be actively motivated to have as many children as would be physically possible for them).

I heard a story/statement once, that every time a bunch of smart people got together to think about solving the world problems, they all pretty much came up with the same solution: eugenics and birth control.

Both of these are controversial subjects at best.

Have you seen the TV show Utopia? Basically a group of people decide it's in the humanity's best interest to wipe out 90% of the population with viruses. Rather grim, but understandable in a way.

While in the domain of Sci-Fi, the solution I liked better was the idea from "Forever peace" by John Haldeman, where human evolution is propelled to the next step by increasing mutual empathy through technology. The Internet might be a small step in that direction.