There are already birth control and other family planning campaigns. I
assume that when and where there's a greater problem with families on
public assistance, living in poverty, having children out of wedlock,
etc., the campaign becomes more aggressive. Saying you're trying to
make the human race more intelligent as well would be counter
productive, but I wouldn't mind a more aggressive campaign for birth
control and abstinence in schools and where ever else to help solve the
other problems that everyone agrees need to be solved.

Anyway, in a few years, they'll be ways to prevent all kinds of mental
illnesses, some of which will require childhood vaccines. The side
effect will be to increase intelligence. Eventually, they'll be such
strong evidence of the effectiveness and safety of drugs whose MAIN
benefit is to increase intelligence, that kids will be taking those.
The next step will be germinal gene therapy, making the increased
intelligence hereditary. I believe a child born today will live to see
this.