https://www.forbes.com/sites/alexknapp/2013/01/03/how-lead-caused-americas-violent-crime-epidemic/
lead in gasoline caused lead poisoning, leading to an increase in violent crime. now most fuel is unleaded, reducing the incidence of lead poisoning, and leading directly to a decrease in violent crime
i can’t read what’s under the sharpie. hemoglobin? guys a vampire i guess