For much of human history, then, an ingot of gold or silver, stamped or not, has served the same role as the contemporary drug dealer’s suitcase full of unmarked bills: an object without a history, valuable because one knows it will be accepted in exchange for other goods just about anywhere, no questions asked. As a result, while credit systems tend to dominate in periods of relative social peace, or across networks of trust (whether created by states or, in most periods, transnational institutions like merchant guilds or communities of faith), in periods characterized by widespread war and
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