If one reads 1491 and 1493...
There was no written language (not true everywhere), no codified law (wrong),no durable institutions (untrue in several places), no cities (Tenochtitlan had a population 4x larger than London in 1491), no philosophy (really?), no science (the Aztecs did things e.g. Agriculture we still haven't figured out), no architecture that scaled (e.g. Tenochtitlan??), no technological trajectory that suggested imminent development.
Seems like he's arguing for manifest destiny and a certain mustached man who argued for the supremacy of a certain tribe.