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If we look at the rest of the world, it seems city building civilizations require large population growth which is sustainable through farming. Quite simply, if you can't feed a city, the city will fail. Additionally, in colder regions people need to move to warmer regions with more food in the winter, unless they can store food in sufficient quantities to ...


3

There is a nice short summary of pre-Columbian trade in the Amreicas by David Carballo. It looks like Cahokian trade was focused on the North American landmass and did not extend to Mesoamerica in a significant way. From the text: Following the adoption of Mexican maize as a primary domesticate, a Mississippian trading system began to flourish within ...



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