James Surowiecki has been reporting on finance and human behavior since the days of the Motley Fool on AOL. He's had a ringside seat for some roller-coaster times in business, but always, his focus has been on regular people -- not titans of Wall Street, but you and me. In 2004, he published The Wisdom of Crowds, an exploration of the hive mind as it plays out in business and in other arenas of life.
Surowiecki is the finance writer for the New Yorker, and writes a lively and funny (and lately, indispensable) blog for newyorker.com, The Balance Sheet. His other books include the wonderfully titled but sadly quite relevant Best Business Crime Writing of 2003.