Did Geography Doom the Native Americans?

The Americas are a fantastic pair of continents. But not the best for civilization building and competing with Eurasia. Which means, was the geography itself the downfall of the native americans? If so, what were the reasons why? \r
\r
___________\r
Facebook: \r
Twitter: \r
\r
Music by:\r
Soundbar: \r
Sam Kuzel: \r
\r
\r
\r
\r
New channel Izz.