We don't focus enough on positive eugenics: getting smart, non-violent and conscientious people to have large families. Right now we do the opposite: smart folks feel all sorts of pressures to have a small or no family due to careers, the expense of elite schooling, the environment, etc. The opening scene of Idiocracy nailed it.
It is reasonable to look at soft negative eugenics, such as offering free, voluntary sterilization for reduction of prison sentences for violent crimes, but getting smart folks to have more kids is far more important.