1) they sure did advance technologically. Compare the Clovis culture of the Lithic stage to the Aztecs of the Post-Classic stage. 2) The book "Guns, Germs, and

1) they sure did advance technologically. Compare the Clovis culture of the Lithic stage to the Aztecs of the Post-Classic stage. 2) The book "Guns, Germs, and Steel" goes into this topic in detail, without starting from the wrong premise that Native Americans made no technological advancements.