The extinction based on indigenous hunters is an old theory and has been debunked on several levels when a comparison of other extemporaneous populations that went extinct is made. Lots of things went extinct that probably had little role if any in the world of the cultures living in the New World before European colonization.

Until introduced to the 'white man' Metchosin the native American was a damn sight closer to our stone age ancestors than you appear to realise.

What a crock of shit.

Aztec calendars.

American southwest.

Mound builders and other pre-colonial architects.

SRS