Who is known to have lived in western Oklahoma around 8000 B.C.?

The Folsom Man is known to have inhabited the region that is now western Oklahoma around 8000 B.C. This group of prehistoric peoples is associated with the Folsom culture, which is recognized for its distinctive stone tools and hunting techniques, particularly the use of spear points that were used to hunt large game such as now-extinct bison. The evidence from archaeological sites indicates that the Folsom Man engaged in a nomadic lifestyle, utilizing the diverse ecosystems of the Great Plains for sustenance.

The other groups listed emerged much later in history. The Plains Indians represent a later period, encompassing various tribes who adapted to the grasslands after the Folsom culture. Similarly, the Pawnee Tribe and the Choctaw Nation are more recent historical entities with established cultures and societies in Oklahoma's history, evolving well after the time of the Folsom Man.