Before I gave biblical, logistic reasons to believe Genesis 1-11 has a historical core. Now I give scientific and historical evidence for real history being behind Genesis 1-11.
Genesis 6:1-4 claims the sons of the gods took as wives whomever they choose, since they married whoever they wanted, it sounds like it could be alluding to polygamy by semi-divine kings from the line of Cain (Lamech?). Jordan Peterson (and others) have pointed out that polygamous societies tend to be more violent, which may explain why God went on to flood the earth for being filled with violence (Genesis 6:11). I don’t claim that the Biblical author knew about the psychological link, but the events seem to allude to such a link happening, which suggests there is a historical core to the narrative.
- I’ll let John Walton explain this better than me. The Tower of Babel story basically shows some insight into how developed societies began to appear in the real world: