that’s not necessarily true. kids used to be less expensive but also people are more picky and want their kids upbringing to be just right now that it’s not something you are basically obligated to do as an adult. if expense was the main issue people in the poorest nations wouldn’t be having tons of them compared to rich countries
I think if we’re including the Industrial Revolution, I’d agree. Countries that go through IRs explode in population and then taper off due to kids no longer needing to be an insurance policy for bringing more income in. However, we were above a 2.0 birth rate in 2007. We haven’t really recovered from 2008 in the sense of putting assets and resources in the hands of those who are going to have children.