Builders of vast geometric earthworks — the Newark octagon, the Mound City necropolis — linked across half a continent by a trade web carrying obsidian, mica and copper.
The earthwork-building and long-distance exchange declined after ~500 AD; the interaction sphere unravelled, though its descendants remained in the river valleys.
The atlas holds 2 border frames for Hopewell — the shape you scrub through changes in 100 BC · 201.
A richly illustrated Smithsonian volume on the great Hopewell earthworks of the Ohio Valley, the monuments behind their World Heritage inscription.
Surveys the Woodland mound-building cultures including Hopewell (broad context).