The one good thing about declining birth rates is that it will eventually destroy the welfare state. This Ponzi scheme collapses pretty quickly if you don’t have more people paying into the system than taking out of it. If feminists were truly concerned about maintaining the welfare state, they would encourage woman to have more children, but this conflicts with their fantasy about being able to have it all without any consequences.
History shows us this as well. It was after the Black Death in the 14th century that wiped out approximately 30% of the population of Europe at that time. (Historians please correct me if this percentage is incorrect!)
It was in the aftermath of the plague that the system in force at that time of serfdom was broken because there simply was not the abundance of labor anymore. This marked the rise of the middle class and the ability of free men to accumulate wealth.