Clarence E. Grim’s theory
In 1987, Dr. Grim, while Professor of Medicine in Residence and director of the Hypertension Research Center at UCLA and the Charles R. Drew University of Medicine and Science at the Martin Luther King Jr. Hospital in Watts, was the first to advance the hypothesis that the greater prevalence of high blood pressure in Western Hemisphere Blacks is related to survival of the fittest during slavery for the ability to store salt and survive the killing salt depleting conditions that led to death during slavery.
On his webpage.
And a good discussion of that.
Roland Fryer, from Harvard, is trying to revive this theory.
