What went wrong with American business at the end of the 20th century? Until the spring of 2001, Enron epitomized the triumph of the New Economy. Feared by rivals, worshipped by investors, Enron seemingly could do no wrong. Its profits rose every year; its stock price surged ever upward; its leaders were hailed as visionaries. Then a young Fortune writer, Bethany McLean, wrote an article posing a simple question how, exactly, does Enron make its money? Within a year Enron was facing humiliation and bankruptcy, the largest in US history, which c…