In the library of Nantucket I attended a presentation by William D. Cohan, a business writer, colomnist of the New York Times, former trader and tv personality. He was supposed to talk about his book “Why Wall Street Matters”, but instead he talked about the four factors that will make a financial crisis happen again. William worked on Wall Street (at Merrill Lynch, JP Morgan Chase and more) for 17 years(!) and thinks the compensation system of that world causes all the financial problems time after time. I interviewed him afterwards and summarized it in five minutes! William wrote a number of books on Wall street and his next book will be different. It will be published next year and he is warning us… Who will listen?