Why did ancient people build massive, mysterious mounds in Louisiana?

Hunter-gatherers at Poverty Point may have built its massive earthworks not under the command of chiefs, but as part of a vast, temporary gathering of egalitarian communities seeking spiritual harmony in a volatile world. New radiocarbon data and reexamined artifacts suggest far-flung travelers met to trade, worship, and participate in rituals designed to appease the forces of nature.

source https://www.sciencedaily.com/releases/2025/11/251121090744.htm