Bronze is not stone. The inca, given a decade would be catching Europe up, with its huge manpower (due to compulsory civil cervace), gold and resources to trade.
Inca would stomp any civilisation upto the romans, which were advanced for their time, and some of its successors.
A decade? Seriously? Please explain how the Incans would be able to, in a decade, go from tinkering with bronze to major production of weapons-grade steel, a process which took Eurasia two thousand plus years.
This is one of my pet peeves about this site. It is assumed that if the Aztecs and/or Incans can beat off the first European attack, they can cram a few thousand years of military technological development (because in this context, that is what matter) in about .1% of the time.
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