Mexico and Central America have plenty of ancient, monumental structures (e.g., Chichen Itza). But the continental US and Canada do not. Why?
In: Engineering
There are – Mississippian culture, for example. Also, survivorship bias can get very strong when a culture decides to use organic materials instead of, say, stone or metal. Climate also affects longevity. Happens quite frequently, in fact. We’re only recently beginning to realize that the Copper/Bronze Age in Europe and the Caucasus was probably a lot more complex and advanced than we initially thought. The problem was that a lot of cultures never had writing, and never used very much inorganic material, and so their material culture never survived.
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