The Forgotten Culture That Built America's "Pyramids" of Dirt [View all]
By Ross Pomeroy
June 25, 2018
Students of history in America are aware of the Ancient Egyptians, the Incas of Peru, and the Aztecs of Mexico, but fewer are familiar with a great civilization that spread across the eastern United States from approximately 800 to 1600 CE. Meet the Mississippians.

Long before European settlers planted the seeds of modern civilization in North America, the Mississippian culture spread from the Florida Panhandle all the way to southern Minnesota. Defining the dozens of discovered settlements are distinct earthwork mounds that resemble pyramids of dirt. Various structures were regularly constructed atop these mounds. Chiefs presided over individual settlements, and were thought to regulate trade, particularly of maize, which archaeologists believe was the primary staple crop.
The rise of centralized agriculture is the most agreed upon explanation for the evolution of the Mississippian culture. Settlements were set up near rivers to take advantage of fertile farmland. Food was grown and shared under the altruistic watch of the settlement chief.
With a reliable source of food, the Mississippians could undertake other pastimes. Metalworkers fashioned stone tools for farming and etched ornate copper plates for adornment. Artists crafted necklaces and pottery out of riverine shells. Spectators watched athletes compete in a game known as chunkey, in which players tried to hurl a spear closest to a thrown disc-shaped stone.
More:
https://www.realclearscience.com/blog/2018/06/25/the_forgotten_culture_that_built_americas_pyramids.html