The collapse of the subprime loan market, the devastating aftermath of Hurricane Sandy, and the emergence of ISIS are all crises that governments, businesses, or society failed to recognize or anticipate. According to Michele Wucker these were not random and unforeseen “black swan” catastrophes, but rather predictable, solvable, and often avoidable, “gray rhino” events. Why do we consistently neglect such obvious dangers? And what do gray rhinos reveal about our attitude to risk?