This is just an amazing research project: The Past Social Networks Project: The first open online repository for network data of ancient social relationships
(from a Danish job posting in archaeology I happened to read randomly)
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Way back when I visited the Bahamas and went to a museum of piracy, and one of the exhibits was a social graph map of all the major pirates of the Caribbean. Took a photo, but pre-iPhone so not sure where it is. Will post if I find it.

