The public is fascinated with financial crashes. Historians portray the roar of an angry mob toppling presidents or prime ministers and destroying the property of those who are regarded as malefactors. And certainly, financial crisis is often a factor in political change. It is often overlooked, but nonetheless significant that one of the major causes for the French Revolution was the poor state of finances, with the nation coming to bankruptcy.

Large systemic financial crises create history. Various actors, big and small, become caught in the drama, contributing to it in their own...