[FarCenter]

High fertility rates are concentrated in countries with average IQs below 100.

[SauronOfMordor]

>>High fertility rates are concentrated in countries with average IQs below 100.<<

What enables the high fertility rates, is charity from the First World. Charity paid by taxes, paid by the middle class, who then find it is too expensive to raise many of their own children.

End that, and things might come into balance.