User blog comment:Ryanchaddock/Finding the First City/@comment-30962347-20190411204316

For additional cool points, mix in the 8.2 kiloyear event and the 4.2 kiloyear event as the destruction of the cities! https://en.wikipedia.org/wiki/8.2_kiloyear_event https://en.wikipedia.org/wiki/4.2_kiloyear_event