The well-known Berber saying “Raiding is our agriculture,” cited in my introduction, is significant. It gestures, I think, in the direction of an important truth about the parasitic quality of raiding. The granaries of a sedentary community may represent two or more years of agrarian toil that raiders can appropriate in a flash. Penned or corralled livestock are, in the same sense, living granaries that can be confiscated. And since the booty of a raid also typically included slaves to ransom, keep, or sell, they too represented a concentrated store of value and productivity—reared at
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