The moment we begin to map the history of money across the last five thousand years of Eurasian history, startling patterns begin to emerge. In the case of money, one event stands out above all others: the invention of coinage. Coinage appears to have arisen independently in three different places, almost simultaneously: on the Great Plain of northern China, in the Ganges river valley of northeast India, and in the lands surrounding the Aegean Sea, in each case, between roughly 600 and 500 BC.
