You may be interested in the previous thread:
It has a great /u/sunagainstgold answer and a great /u/hillsonghoods answers coming at the question from two completely different angels and being in sum, more or less, everything that this subreddit when it’s at its absolute absolute best. I might recommend reading /u/hillsonghoods’s first as it’s about the historiography of schizophrenia and then read /u/sunagainstgold’s next because it’s a detailed look at the Middle Ages.