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Your first graph is surprising. In general, people from across Africa have the greatest genetic diversity. Mostly thanks to founder effect https://en.wikipedia.org/wiki/Founder_effect from what I heard.

But your first graph shows all of their African samples clustered relatively tightly together.

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That's because the x-axis is "pairwise allele-sharing distance" ie: we munged the data every which way to find something that we could use k-means clustering to write a paper.

A better graph would be a "pairwise interracial-fucking distance" with the y axis the percentage of healthy babies born. That would be just one cluster.

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