"The discovery of this ceramic water pipe network is remarkable because the people of Pingliangtai were able to build and maintain this advanced water management system with stone age tools and without the organization of a central power structure. This system would have required a significant level of community-wide planning and coordination, and it was all done communally."

https://phys.org/news/2023-08-china-ancient-pipe-networks-communal.html

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China's ancient water pipe networks show they were a communal effort with no evidence of a centralized state authority

A system of ancient ceramic water pipes, the oldest ever unearthed in China, shows that neolithic people were capable of complex engineering feats without the need for a centralized state authority, finds a new study by University College London rese…

^{Science X (Phys.org)}