The best explanation I've heard for the falling birth rates of developed countries is that the cause is a massive increase in social expectation on parents.
It used to be that whether your child made it through childhood was up to God due to the massive number of risk factors beyond the parents' control. Those risk factors are much more easily mitigated in developed countries, so now the responsibility rests solely on the parents, and that's why kids can no longer go outside.
It used to be that whether your child made it through childhood was up to God due to the massive number of risk factors beyond the parents' control. Those risk factors are much more easily mitigated in developed countries, so now the responsibility rests solely on the parents, and that's why kids can no longer go outside.