What a difference two decades makes. In the 1980s, Carl Icahn loomed large as a corporate raider, in the mold of the Gordon Gekko character in the movie Wall Street. Icahn made a lot of money but was vilified for what some considered a slash-and-burn approach to taking over companies.

Twenty years later, Icahn has morphed into a shareholder activist and rails against what he considers to be incompetence among senior executives and on boards. "They call me raider. They call me an activist," says Icahn, who, at 72, shows no sign of slowing down. "I don't know what those labels mean. All I know is that something should be done to improve corporate governance and management. If we don't, managements will remain unaccountable and our economy will suffer."