Violent crime quadrupled in the US between 1970 & 1990, then fell the same amount. What could have caused such a dramatic trend? Economics? Culture? …Lead?
Environmental Policy as Social Policy? The Impact of Childhood Lead Exposure on Crime (Reyes, 2007) - http://www3.amherst.edu/~jwreyes/papers/LeadCrimeBEJEAP.pdf
The Lead Poisoning Prevention Act of 1971 - https://www.govinfo.gov/content/pkg/STATUTE-84/pdf/STATUTE-84-Pg2078.pdf
Rationally Speaking ep. 224 - Rick Nevin on “The long-term effects of lead on crime” - http://rationallyspeakingpodcast.org/show/rs-224-rick-nevin-on-the-long-term-effects-of-lead-on-crime.html
An Updated Lead-Crime Roundup for 2018 by Kevin Drum - https://www.motherjones.com/kevin-drum/2018/02/an-updated-lead-crime-roundup-for-2018/
This recent study has findings that seem contrary to the LCH:
Association of Childhood Blood Lead Levels With Criminal Offending (Beckley et al, 2018) - https://jamanetwork.com/journals/jamapediatrics/fullarticle/2666777
Witchcraft or Mycotoxin? The Salem Witch Trials (Woolf, 2000) - https://www.pendleton.k12.ky.us/userfiles/119/classes/401/witchcraft%20or%20mycotoxin.pdf