When the First World War ended in 1918, among its innumerable casualties was the world’s financial system. During the latter half of the nineteenth century, an elaborate machinery of international credit, centered in London, had been built upon the foundations of the gold standard and brought with it a remarkable expansion of trade and prosperity across the globe. In 1919, that machinery lay in ruins. Britain, France, and Germany were close to bankruptcy, their economies saddled with debt, their populations impoverished by rising prices, their currencies collapsing. Only the United States had emerged from the war economically stronger.