Many theorists believed a hundred years ago, just as they did at the beginning of our twenty-first century, that the world had reached a state of economic perfection, a never before seen condition of beneficial human interdependence that would lead to universal growth and prosperity. And yet the early years of the Weimar Republic in Germany witnessed the most complete and terrifying unravelling of a major country´s financial system to have occurred in modern times. The story of the Weimar Republic´s financial crisis has a clear resonance in the second decade of the twenty-first century, when the world is anxious once more about what money is, what it means and how we can judge if its value is true.