The claim that this couldn’t work because such models are limited seems just arbitrary and wrong to me.
The economists I spoke to seemed to think that in agency unawareness models conclusions follow pretty immediately from the assumptions and so don’t teach you much. It’s not that they can’t model real agency problems, just that you don’t learn much from the model. Perhaps if we’d spoken to more economists there would have been more disagreement on this point.
Is this a fair description of your disagreement re the 90% argument?
Daniel thinks that a 90% reduction in the population of a civilization corresponds to a ~90% reduction in their power/influentialness. Because the Americans so greatly outnumbered the Spanish, this ten-fold reduction in power/influentialness doesn’t much alter the conclusion.
Matthew thinks that a 90% reduction in the population of a civilization means that “you don’t really have a civilization”, which I interpret to mean something like a ~99.9%+ reduction in the power/influentialness of a civilization, which occurs mainly through a reduction in their ability to coordinate (e.g. “chain of command in ruins”). This is significant enough to undermine the main conclusion.
If this is accurate, would a historical survey of the power/influentialness of civilisations after they lose 90% of the population (inasmuch as these cases exist) resolve the disagreement?