The next chapter examines the history of obscure artifacts and objects that have been used as money throughout history, from the Rai stones of Yap Island, to seashells in the Americas, glass beads in Africa, and cattle and salt in antiquity. Each of these media of exchange served the function of money for a period during which it had one of the best stock‐to‐flow ratios available to its population, but stopped when it lost that property.
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