Pattonias said:
It would be interesting to speculate on what would have come of the empire had it been permitted to exist for another five hundred years. If I recall correctly, the Aztecs were just recovering from a devastating plague when the first Spanish arrived.
It would have thrived, unless an external threat arrived to crumple it.
That's my opinion.
A related point:
That humans have a "default allegiance" to their own kin, and little feeling of allegiance to non-kin, is wholly insufficient to explain the mindset of a predatory culture like the Aztecs.
In addition to that, you need YEARS of conditioning of the Aztec, from watching the sacrifices as a little boy, hearing terrifying stories about what would be done to YOU and your little sister if the subject races were to be given "freedom", inculcation of racist propaganda of innate superiority, physical beatings to ensure falling into the "party line" and so on and so forth.
Although we have NO remaining evidence indisputably proving the above conditioning process within Aztec culture, is it possible to doubt that such conditioning took place at all?
Frankly, I don't see how (perhaps someone can enlighten me).
Furthermore, if we make use of this as a working hypothesis, can this perhaps give rise to some interesting interpretations of actual remains of Aztec culture?
For example, might it be that members of the subject races were pictorialized as sub-human, perhaps underscored by giving them an animal's head, so that we need not regard ALL such remaining pictures as being pictures of deities, but perhaps better as images from derogatory, cautionary tales about the subject races the Aztecs preyed upon?