Edward Chancellor traces the history of interest from its origins in ancient Mesopotamia, through debates about usury in Restoration Britain and John Law ' s ill-fated Mississippi scheme, to the global credit booms of the twenty-first century. He takes the story to the present day, when interest rates have sunk lower than at any time in the five millennia since they were first recorded - including the extraordinary appearance of negative rates in Europe and Japan - and highlights how this has contributed to profound economic insecurity and financial fragility. As the global financial system edges closer to yet another crisis, Chancellor shows that only by understanding interest can we hope to face the challenges ahead.