What caused them to never move past stone tools, and no real form of government. No livestock farms, currency, etc...
There's always room for discussion, but perhaps these previous topics found through the search function will answer your inquiry.
Are Native Americans considered to be in the stone age before the Spanish arrived and introduced metal?
Why was medieval Europe and Asia so advanced while Native Americans, African tribes and Indigenous Australians were virtually stuck in the stone age for thousands of years?
Were Indigenous Peoples Of The Americas mostly living in the Stone Age up until European contact? All of them, or just some? Where?