There is some consistent evidence for the current timelines for human civilisation - although it's all sketchy. - complexity and type of tools & technology dug

There is some consistent evidence for the current timelines for human civilisation - although it's all sketchy. - complexity and type of tools & technology dug up - change in pollen due to agriculture - change in genetics of domesticated animals None of these (as far as I know) point to cities or civilisations that didn't have cities (if such a thing is conceivable, which it could be) way further back than the current records show.