[marcosdumay]

Across countries this is a very noisy cloud of points where, if you go out and calculate a regression it's pointing down. Like every other social variable.

Since population explosion has felt out of fashion, there's a long time that I didn't see such plot. But what I've seen has a much clearer tendency than most social correlations people use at real decisions. It's about as clear as most correlations of quality of life with GDP.