recovered childhood blood-lead data from Reuters, joined to the harms that tend to follow it. pick any layer in the rail. darker is higher. county layers shade roughly 96 to 99% of US counties; state layers shade all 48 contiguous states plus DC. every layer carries its own Source line.
this is an ecological association, county to county, not a claim about any one person. lead is one driver among several, necessary but not sufficient. the cohort layer reads as a national correlation at the birth cohort's modal age, painted on every state so you can see it against the rest. the defensible signal in the historical record is the steep decline after leaded gasoline was removed, not a mid-century rise.
recovered Reuters lead data and the documented downstream harms. one fetch, drawn on canvas.
lead is necessary, not sufficient. the same forces that left lead in old paint and old soil also tracked with poverty, housing age, and disinvestment, and those move with the harms too. read this as one strong thread in a knot, shown county by county, not a single cause and not a verdict on any individual.
