The OP talks about the drought extensively. Quoting:

> there is quite a lot of compelling evidence that period of LBAC [late bronze age collapse], especially the 1190s, was unusually dry in the Eastern Mediterranean, which would have caused reduced agricultural output (crop failures). Interestingly, this would be most immediately impactful in areas engaged primarily in rainfall agriculture (Greece, Anatolia, the Levant) and less impactful in areas engaged more in irrigation agriculture (Egypt, Mesopotamia).³ And, oh look, the areas where LBAC was more severe are in the rainfall zone and the areas where it was less severe are in the irrigation zone.