How Lead Caused America's Violent Crime Epidemic

An Updated Lead-Crime Roundup for 2018 – Mother Jones

Debunking the lead crime hypothesis, by Peter Miller

Opioid epidemic in the United States - Wikipedia

Americans view increases in violent crime as a national issue

Environmental Injustice? Disparities in the Exposure to Environmental Lead Poisoning and Risks among Children in the Chicago Neighborhoods

Irresistible group

Lead: America's Real Criminal Element – Mother Jones

Surveillance for Violent Deaths — National Violent Death Reporting

In the book, Freakonomics, the authors claim that abortion led to a huge decline in the murder rate. Is this actually true or is there another explanation for the decline of murders?

Throughout the history of US cities, what has been the reason for increased violence and crime in urban areas, and have those reasons changed over time? - Quora