A decade ago in “The Chaco Meridian: Centers of Political Power in the Ancient Southwest,” [Steve Lekson] argued that for centuries the Anasazi leaders, reckoning by the stars, aligned their principal settlements along this north-south axis — the 108th meridian of longitude. In an article this year for Archaeology magazine, he added two older ruins to the trajectory: Shabik’eschee, south of Chaco, and Sacred Ridge, north of Aztec. Each in its time was the regional focus of economic and political power, and each lies along the meridian. As one site was abandoned, because of drought, violence, environmental degradation — the reasons are obscure — the leaders led an exodus to a new location: sometimes north, sometimes south, but hewing as closely as they could to the 108th meridian.
“I think the reason is ideological,” Dr. Lekson said on a recent visit to Paquimé. “The cultural response to something not working is to move north, and when that doesn’t work you move south. And then you move north again and then you move south again, and then you finally say the hell with it, I’m out of here, and you go down to Chihuahua.”
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