> One thing people never get about fertility crisis: people always have more babies in crisis and uncertainty. Simply matter of reproductive strategy: when you're not sure about the future, push for quantity, as fast as possible. When you have stability, you can accumulate resources, and not be afraid to invest them into fewer offspring.

I don't think that's true. There's a lot of crisis and uncertainty today, but fertility is still going down. Many people are investing their resources in zero offspring.