HUH!? This doesn't correspond to any history that "I" know about. In the past, "depopulation" was CAUSED BY "disease, war, economic disaster". Add to that list REAL "climate change" (specifically sudden shifts from WARM to COLD). Population increases have historically happened when climate was WARMING, and population crashes when climate was COOLING.
The current "child dearth" is completely different, being a voluntary limitation on fertility. And I don't see how, given the increasing availability of automation, that an "economic disaster" is in the offing for anything other than the welfare state, which depends on stealing from future generations to finance current largesse.
Far more critical is that fact that the "best and brightest" are severely limiting their fertility while the "worst and dumbest" are breeding like flies. Basically "reverse evolution".
As you can see on this very thread, even FR has Big Governmentalists for whom the pruning of any of Big Government's tentacles would be the worstest disaster ever.