The document summarizes the four main periods of Native American history in Illinois:
1) Paleo Indians were nomadic hunter-gatherers who used fluted spear points and migrated long distances.
2) Archaic Indians used specialized tools like atlatl weights and lived in smaller territories while populations grew.
3) Woodland Indians practiced horticulture and lived in villages, developing pottery, pipes, and the bow and arrow.
4) Mississippian Indians built large villages and cities like Cahokia, practicing agriculture in permanent settlements.