Whenever an article like this gets written I immediately see so many comments to the effect of "It's obviously X." No. It's not obviously anything. It's not ob

Whenever an article like this gets written I immediately see so many comments to the effect of "It's obviously X." No. It's not obviously anything. It's not obvious. Saying it's obvious seems actively harmful to me. The only thing that's obvious to me is that precise measurement and research would be the smart thing to do. I'd love to try to understand the change through whatever data we can. What variables correlate (geography? income? religion?)? Can we break down what % of this is changes in unwanted pregnancies? Can we break down what % of this is people physically unable to have kids? Can we break down what % of this is pessimism about the future? What about genetics? This is a question that's worthy of millions of dollars of research imo.