The current version of history that we've been told they were civilizations in Illinois 10,000 years

The current version of history that we've been told they were civilizations in Illinois 10,000 years we don't even know they were but why would anyone care for suggesting that our historical timelines were fax, advanced civilizations in earlier moments and time and that they had been eliminated somehow climactic events through national disasters, and they were not aware of them. Why don't we tell us ourselves? We don't know that's what I would think. I know what I learned as a kid is wrong.