Another human-hating, leftist archaeologist. Ants farm aphids, is this "artificial?"
Just common sense says that it would go up because you wouldn't stop hunting and gathering in addition to farming. I mean, I farm but I still go to the grocery store.
The only thing I could come up with is that they were then stationary and their enemies knew where to find them.
Not to give any credit to humans for being instinctively inventive and supremely adaptive....
The author seems to have trouble accepting that people invented farming, not armadillos.