Jeff Dyer is the Horace Beesley Professor of Strategy at the Marriott School, Brigham Young University. He is widely published in strategy and business journals and was the fourth most cited management scholar from 1996-2006. Hal Gregersen is a professor of leadership at INSEAD. He consults to organizations around the world on innovation, globalization, and transformation and has published extensively in leading academic and business journals. Clayton M. Christensen is the Robert and Jane Cizik Professor of Business Administration at Harvard Business School and the architect of and the world's foremost authority on disruptive innovation.