You haven't convinced me that there were no domesticable animals in the new world, or that that was the major factor.
It also doesn't explain why new world people already had a need penicillin formulations (earlier comment).
But if you are right, it sounds like the trade-offs that come with domestication may not be worth it except as accidental biological warfare. https://pubmed.ncbi.nlm.nih.gov/15539148/
Also, the rats that carried the black plague were not domesticable. Don't you think open sewers in the streets contributed to disease a bit..
The proof that there were no domesticable animals in the new world is that...no animals besides the llama [0] were domesticated. People lived here for tens of thousands of years. If something could have been domesticated, it would have, because that's what humans do.
And yes, the black plague is zoonotic, as I said. And yes, cities do contribute, because packing a lot of people together give plagues fuel. Plagues are almost always zoonotic, because any disease that kills all its hosts also dies. Plagues usually have a reservoir in animals, mutates to jump to humans and kills them by accident, really.
[0] And guinea pigs, I guess, but you can't build an empire on overgrown squeaky toys.
Turkeys, llamas, ducks, mink, ostrich, etc.. https://en.wikipedia.org/wiki/List_of_domesticated_animals
Anyway it sounds like you're referring to Francis Galton's old take on the topic which doesn't really hold up in many ways https://galton.org/essays/1860-1869/galton-1865-domesticatio...
You haven't convinced me that there were no domesticable animals in the new world, or that that was the major factor.
It also doesn't explain why new world people already had a need penicillin formulations (earlier comment).
But if you are right, it sounds like the trade-offs that come with domestication may not be worth it except as accidental biological warfare. https://pubmed.ncbi.nlm.nih.gov/15539148/
Also, the rats that carried the black plague were not domesticable. Don't you think open sewers in the streets contributed to disease a bit..