And if the country is not providing a better future for the kids than the parents, why are you surprised they're not breeding? You're also ignoring the differences in standards. For some countries, a good future might be not dying of dysentery, for others is having a single family home.

>If we knew the reasons, we'd solve the problem.

You're talking like a true politician here. "Ah geez, if only we knew why people are getting depressed, poorer and not breeding, we'd totally fix it, but as we have no clue, I guess our hands are tied, oh geez. It's totally not our immigration, zoning and financial policies that have made wages stagnate and housing more expensive and of poorer quality for your kids, no, it's the fault of video games, dating apps, avocado toast and hookup culture."