The Rise of Endymion (Hyperion Cantos, #4)

by Dan Simmons

“Remember, the economy wasn’t really global then, and it depended upon private money institutions called banks, gold reserves, and the value of physical money—actual coins and pieces of paper that were supposed to be worth something. It was all a consensual hallucination, of course, and in the 1930s, the hallucination turned nightmare.”