If all societies descended from Noah, then they would all have started with the same flood story which would have been modified through the ages. So that you end up with what we have now. Slightly different variations on the Noah story.
But if all societies hadn't descended from Noah, then you wouldn't expect those similarities to exist.
But if all societies hadn't descended from Noah, then you wouldn't expect those similarities to exist.
If all societies descended from Noah, you would expect DNA evidence to show that. It does not.
The stories of floods around the world reflect the fact that many human populations live near bodies of water! Look at New Orleans! Ever hear of Johnstown? How about tsunamis? Do they count too? Floods happen!
To try to take hundreds of flood stories and make them all tie into a "global" flood which wiped out all extant populations is a huge stretch. But about right for creation "science."
Its about apologetics, not science.
Then you say that one particular myth is therefore proven. I find this illogical. Why "that one"?
If you give intellectual weight to all these myths, why single out one? Is there any evidence? [Quoting one tradition's sacred text is not evidence.]
And you assert that Noah's progeny established all these societies and carried not only the myth with them, but also their genes. The evidence is that American Indians are not closely genetically related to Semitic peoples [Noah] (unless you are a Mormon Christian, then all bets are off).
You may be right, but the evidence is far from persuasive.