A tribe had multiple locations in an area that it would rotate through.
They would set up camp at a suitable location_A and begin hunting and fishing until the area became depleted at which point they would relocate to a fresh location_B and repeat the process. Eventually they would move back to location_A.
This movement from one camp location to another often followed a seasonal pattern.
My guess is agriculture began not long after the people learned how to use fire as a grassland management tool. They would set fire to a grassland and after the fire scatter whatever seeds they had available around to await the rains.
“Until the area became depleted”
So, they were democrats?