The 3K-5K is extrapolated based on the time spans of the claimed length of these civilizations but I should clarify that most of the writing about how the ancie

The 3K-5K is extrapolated based on the time spans of the claimed length of these civilizations but I should clarify that most of the writing about how the ancient world viewed itself comes from after 2K and especially after 1K. The "biblical" (bad word for it, considering how ubiquitous it is as a legend world wide) flood fixtures prominently as a moment of civilizational collapse. The tricky part is how to interpret the multi-thousand year "reigns" of the "gods" that supposedly came before that.