Originally Posted by deltav

Ahh, gotta love the irony of countering an exaggeratedly high figure not based in accepted historical research with an exaggeratedly low one not based in research.

The population estimates from actual historians of pre-Columbian North American (i.e. excluding SA) range from 1-2 million to around 20 million. After the bulk of them died, it actually took centuries for many regions to climb back to their pre Columbian population levels.