Apparently the same with the Anasazi in the NA SW. No food is a problem.
Excellent point. We have ample eviddence of a like situation right here in the USA.
The Anasazis, or whatever those ancient southwestern high country peoples may be called, didn’t just all die out, I’m sure, but I’ve not seen any archaeological studies tracing their (supposed) transition to the groups of recent times, the Hopis, Zunis, Apaches, et cetera, of our contemporary acquaintance. Whenever I visit the ruins of those “lost” peoples, I wonder where they went and who they became.