The hunters started to exist when weapons were created not only for war but for feeding on living animals once you have killed them to get fresh meat.
The hunters became hunters once the battle for land started. Weapons were forged and battles started with Europeans. Indians fought for freedom of the land and Europeans fought to claim it. Having weapons enabled Indians to get animals by hunting them and they were able to get fresh meat. Now scavenging was done more by the women than the men.
The hunters now preferred fresh meat, but soon seeds were discovered and again Indians' lives were changed with new foods. Planting