In 1492 when Columbus discovered America it was estimated there were a hundred twelve million native Americans living here. Genome studies have proven all native Americans are of Asiatic origin. If Europeans made it here first, they are the ones that died out.The Sage of Main Street yes, like the disappearance/etc of other civilizations.......they withstood some climate changes/etc, but not multiple problems, multiple droughts/etc......their birth rates/etc were not high in the first place..