Positive feedback-when A produces B, which in turn produces even more A-drives not only abrupt climate changes, but also the most important and disruptive events in economics and finance, from asset bubbles to debt crises, bank runs, even corporate corruption. But economists, with few exceptions, have ignored this reality for fifty years, holding onto the unreasonable belief in the wisdom of the market. It's past time to be asking how do markets really work? Can we replace economic magical thinking with a better means of predicting what the financial future holds, in order to prepare for,...