Why do CEOs struggle with the act of imagination when it comes naturally to 5-year-olds? And what happens when people and organizations seemingly lose their ability to imagine? Martin Reeves, chairman of the BCG Henderson Institute, argues that imagination is an untapped and essential resource for organizations. This is particularly true in an error when competitive advantages that once lasted a decade can disappear in as quickly as a year--and as companies see their growth potential decays as they grow and age. Reeves, coauthor of The Imagination Machine, explains how organizations can regain the art of imagination. Hint: it takes practice.