FWIW there's a Prolog-based graph DB called Terminus: https://medium.com/terminusdb https://medium.com/terminusdb https://github.com/terminusdb https://github.

FWIW there's a Prolog-based graph DB called Terminus: https://medium.com/terminusdb https://medium.com/terminusdb https://github.com/terminusdb https://github.com/terminusdb I don't know much about it but they are associated with Seshat Global History Databank http://seshatdatabank.info/ http://seshatdatabank.info/ which, if I understand correctly, is something like a serious attempt at "psychohistory" (like in Asimov's Foundation.) https://medium.com/terminusdb/stuffing-the-whole-human-history-in-one-knowledge-graph-e52984f562c7 https://medium.com/terminusdb/stuffing-the-whole-human-histo...