"In Mesoamerica, located in modern Mexico and Central America, early civilizations did not form around large rivers like in Afro-Eurasia. The Olmec developed in what is now called Mexico. The development of this civilization was very different from the Afro-Eurasia river civilizations. They relied on fishing and growing Maize in moist areas, as did the Chavin culture, but they also were very active in trading their products for many raw materials for artisans. Based on this trading, they were able to develop institutions and writing, thus making them an actual civilization. Like China, they adapted to their environmental isolation by developing a local trade network."
Early Meso-American and Chinese civilizations experienced environmental isolation, but were able to adapt.
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