It’s a theory that’s been around for a while but this article shows the convincing evidence. “Gasoline lead (Pb(CH2CH3)4) is responsible for a good share (as much as 90%) of the rise and fall of violent crime over the past half century. Childhood blood lead levels are consistently associated with higher adult arrest rates for violent crimes.”
New research finds Pb is the hidden villain behind violent crime, lower IQs, and even the ADHD epidemic. And fixing the problem is a lot cheaper than doing nothing.
Source: America’s Real Criminal Element: Lead | Mother Jones