Art Kleiner is a writer, editor and futurist. His books include The Age of Heretics: A History of the Radical Thinkers who Reinvented Corporate Management; Who Really Matters: The Core Group Theory of Power, Privilege and Success; and The Wise Advocate: The Inner Voice of Strategic Leadership. He was editor of strategy+business, the award-winning magazine published by PwC, and editorial director of the bestselling Fifth Discipline Fieldbook series with Peter Senge.