But people are wild about it. Low birth rates in wealthy countries are arrived at by choice. As a US citizen with two kids, I actively chose not to have more. T

But people are wild about it. Low birth rates in wealthy countries are arrived at by choice. As a US citizen with two kids, I actively chose not to have more. This is my preference (and, in aggregate, the preference of the rest of the US as well). If one or both of them were likely to die before reaching maturity, and my retirement plans assumed they would pay for my dotage... then maybe I'd have more? But that's not the case; as it is I'm happy with my choice to just have two.