Could North America have been able to sustain a large, pre-industrial, independent, and organized society? Basically like Europe around the Middle Ages?
If so, in what capacity? i.e. how would the Eastern Coast of North America (modern US/Canada) compare to the valleys of central Mexico, or the Caribbean Islands, or the Central American isthmus? I mean, sustainable population, trade, etc.
This is assuming people in this society have basic things like the wheel, or horses.