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Two particular technological advancements would move Europe and the world away from physical coins and in turn help bring about the demise of silver's monetary role: the telegraph, first deployed commercially in 1837, and the growing network of trains, allowing transportation across Europe. With these two innovations, it became increasingly feasible for banks to communicate with each other, sending payments efficiently across space when needed and debiting accounts instead of having to send physical payments. This led to the increased use of bills, checks, and paper receipts as monetary media instead of physical gold and silver coins. More nations began to switch to a monetary standard of paper fully backed by, and instantly redeemable into, precious metals held in vaults.
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Saifedean Ammous (The Bitcoin Standard: The Decentralized Alternative to Central Banking)