A reader comments on Kevin Drum’s lead theory:
I hadn’t known about the perfect mapping of the British curve differences. And it alludes to similar results in other countries. I think the conclusion is pretty irrefutable at this point: leaded gasoline caused fetal harm to the extent that a more numerous cohort of adults faced difficulties dealing with life and committed more crimes. It’s not the sole cause; society is a complex system and there are never simple or single answers. But it certainly appears to a be a major one.
