In Iran, after the revolution, the Khomeini called for more children and population growth quickly moved to 4%. Then in the 2000 they did some campaign “two children are enough” bla bla and it worked as well. This is evidence that just simple messaging, together with the general socio-economic conditions, can have a drastic impact.

I'd be interested in knowing more about the type of contraceptives and reproductive health the women had access to during these times. You can't just point to that and say it's because of messaging.

So I don’t quite believe what you’re implying, that it can’t be solved through money. It’s just similar to climate change, the costs are immense.

You don't have to believe me, it's playing out right now. There are plenty of countries offering monetary compensation for people to have more children and it barely affects the numbers.

The root of the fall is because women have more control over when and how many children they have.