Women are not allowed to work or become "educated." They remain under the control of their fathers until they get married, at which times they become under the control of their husbands. And the smart are married to the smart.
It means removing the State and its destructive laws from people. Specifically, it means the destruction of the evil of feminism and female "education" and employment (many women's "jobs" are parasitical make-work ones).
The population would skyrocket.
I'm not saying I believe in doing this, just pointing how to increase the population. I can entertain an idea without agreeing with it.
The way things stand now we're subsidizing the stupid and preventing the smart from reproducing (Lothrop Stoddard called the stupid and hopeless "the Under Man," the kind who have a great influence on goverment policy).
We're incinerating the smart, which means we're incinerating civilization.
It appears we are heading straight into Idiocracy. Or worse.