From the excerpt, we can infer that population trends depended on Trade and settlement resulting from maize cultivation.
Before Christopher Columbus came to the Americas, several civilizations had formed that boasted of large cities such as:
These cities were built on maize cultivation which allowed for huge populations to be fed which led to a population increase that then led to the cities growing even larger.
In conclusion, maize cultivation allowed for the growth of large populations in pre-Columbian Mexico and when maize could no longer be cultivated, cities like Cahokia were abandoned.
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