>>507281216It could be done socially.
Death penalty. Come down hard on criminals.
Sterilise felons.
Encourage their most intelligent men to take multiple wives, or mistresses.
Encourage their most intelligent women to have a minimum of 3, and preferably 6 children, instead of the 70 IQ welfare queens who do this now.
You want the 70 IQ welfare kings and queens sterilised while on welfare. i.e. You only get welfare if you accept contraceptive injections.