There are innumerable studies of, say, the use of cattle as money in eastern or southern Africa, of shell money in the Americas (wampum being the most famous example) or Papua New Guinea, bead money, feather money, the use of iron rings, cowries, spondylus shells, brass rods, or woodpecker scalps.43 The reason that this literature tends to be ignored by economists is simple: “primitive currencies” of this sort are only rarely used to buy and sell things, and even when they are, never primarily to buy and sell everyday items such as chickens or eggs or shoes or potatoes. Rather than being
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