Throughout the violent financial disruptions of the past several years, three men have stood out as beacons of judgment and wisdom: Warren Buffett, George Soros, and Paul Volcker. Though their experiences and styles vary -- Buffett is the canny stock market investor; Soros is the reader of shifting global tides in trade and currencies; and Volcker is the regulator and governor, sheriff and clean-up crew -- they have very much in common. All...