Antrpologists think it outdates the bow by thousands of years and maybe the atlatal. That is if you believe them
Ancient Utes (Yampah), woodland tribes, west Coast NA'S, plains trbes(before the Spanish introduced horses) southeast an midwest tribes. Almost all soceities used them here in North America. Another hint..men and boys used them in NA soceities and Paleo Indian groups.
Like Justin said, probably one of the original hunter gather weapons fer the hunt. BTW, it works as good today as it did then, I know I have used the 2 you see.
........bob