This period takes place…well, broadly speaking it takes place any time between 16,000 BCE and 1000 CE, but we can narrow the range a little to the time between 4500 BCE and 31 BCE for simplicity's sake.
12,000 BCE: The Survivor
4500 BCE: The Tule-Eaters
4000 BCE: The Lords of the Mounds
2000 BCE: The Pottery-Makers
1800 BCE: The Journeyers
1700 BCE: The Fallen People