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.
Wow, deceptive submission title.
Are you crazy? Have you ever been to a casino?? "Whach talkin bout, willis?