Why Wall Street MattersA fiery defence of the banks and a stark reminder of why we should all want them to thrive, from New York Times bestselling author William D. Cohan. If you like your smartphone or your widescreen TV, your car or your pension, then, whether you know it or not, you are a fan of Wall Street. William D. Cohan, bestselling author of House of Cards, has long been critical of the bad behaviour that plagued much of Wall Street in the years leading up to the