antanicus, Italian "In a study published in Nature Water, the archaeological team describe a network of ceramic water pipes and drainage ditches at the Chinese walled site of Pingliangtai dating back 4,000 years to a time known as the Longshan period. The network shows cooperation among the community to build and maintain the drainage system, though no evidence of a centralized power or authority."
But yeah, a stateless society could never work according to the libs
https://phys.org/news/2023-08-china-ancient-pipe-networks-communal.html