>>213732215
You're a moron, and yeah tribes like the different Sioux were not as indigenous to their areas as they like to claim, but there were tribes among the Great Plains before horses and firearms. And hunting in such a region is not impossible on foot. The glacial steppes had humans hunting mammoth on foot for many millenial before horses were domesticated; the bushmen of African savannahs still hunt on foot; you greatly underestimate the advantages just bipedal walking and shoulders that can cast objects are.