I think Kevin Drum (R.I.P.) covered this better than the author of this piece. https://www.motherjones.com/environment/2016/02/lead-exposure-gasoline-crime-inc

I think Kevin Drum (R.I.P.) covered this better than the author of this piece. https://www.motherjones.com/environment/2016/02/lead-exposure-gasoline-crime-increase-children-health/ https://www.motherjones.com/environment/2016/02/lead-exposur... https://www.motherjones.com/kevin-drum/2018/02/an-updated-lead-crime-roundup-for-2018/ https://www.motherjones.com/kevin-drum/2018/02/an-updated-le... And, addressing the meta-analysis the New Yorker author places so much weight on: https://jabberwocking.com/yet-another-look-at-that-lead-crime-meta-study/ https://jabberwocking.com/yet-another-look-at-that-lead-crim... The clincher is that competing hypotheses are almost exclusively concerned with phenomena in the U.S. and fall apart as explanations for the same cresting and subsidence of the crime wave in other countries, or even simply in other cities in the U.S. One city does broken-windows policing. Another doesn't. Both experience the same decline in the murder rate.