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Those other cultural centers were probably copying Cahokia, he says. "The signs of conflict don't really start in earnest until resources become scarcer after A.D. 1250," he says. Please be respectful of copyright. And they began declining when the global climate abruptly cooled during a time called the Little Ice Age. There are clues. A city surrounded by strong wooden walls with thatch-covered houses that were home to 20,000 to 40,000 people. Were moving away from a Western explanationthat they overused this or failed to do thatand instead were appreciating that they related to their environment in a different way., And that suggests that hypotheses for Cahokias decline and collapse are likely to become more complex. While we will never know for sure, it is possible that a similar event happened at Cahokia. It has been a special place for centuries. Excavations at Cahokia, famous for its pre-Columbian mounds, challenge the idea that residents destroyed the city through wood clearing. Recognizing their mistake, the Cahokians began replanting the forest but it was too little too late. Then, the fall of Cahokia might have had a domino effect on other Mississippian city-states that depended culturally and politically on Cahokia, he adds. The trick is to stop evaporation from drying out the top. The young men and women probably were forced to die and were chosen because they were not powerful people. There are two main ideas for why people left Cahokia: societal problems and environmental problems. . The earliest mound dated thus far is the Ouachita Mound in Louisiana which was built over 5,400 years ago. it was a planned city built by an organized Mississippian labor force using mathematical and engineering skills. Heres how paradise fought back. Lopinot, one of the archaeologists who originally proposed the wood-overuse hypothesis in 1993, and who is now at Missouri State University, welcomes Rankins research. Most of the earthworks were shaped like big cones and stepped pyramids, but some were sculpted into enormous birds, lizards, bears, long-tailed alligators and, in Peebles, Ohio, a 1,330-foot-long serpentNone of the mounds cover burials or contain artifacts or show signs of use. A couple centuries after its birth it went into decline, and by 1400 it was deserted. With your support millions of people learn about history entirely for free, every month. How this animal can survive is a mystery. (LIA; 1300-1800 CE), a period when much of the world had cooler weather. Our publication has been reviewed for educational use by Common Sense Education, Internet Scout (University of Wisconsin), Merlot (California State University), OER Commons and the School Library Journal. One thousand years ago, it was home to Cahokia, a Native American metropolis. Cahokia was the hub of political and trading activities along the Mississippi River. Mississippian: Environment