Just as a curiosity, could I point out: the blood lead levels in the most badly affected Flint kids is lower than that of average white kids in the 80s. And that Flint residents by no means have the highest lead levels, even in the USA. It is thought to account for one or two IQ points, tops. Or about the same as fluoride in the most overfluoridated regions (natural fluoride, China).Mandatory lead paint in wypipo houses.
The idea that lead is making blacks exceptional, or that less lead is responsible for the decrease in crime, is unmitigated bullshit.