Silver’s been around forever. The Athenians were mining it in Attica, and the Romans, as you know, used silver to expand their empire once they realized what it could do. But silver didn’t become international currency, didn’t facilitate a trade network spanning continents, until much later. There simply wasn’t enough of it. Then in the sixteenth century, the Hapsburgs – the first truly global empire – stumbled upon massive silver deposits in the Andes.
