In this interview, Dr. Iain McGilchrist discusses how his hemispheric hypothesis may help explain the widespread addiction in society. Dr. McGilchrist, a psychiatrist and writer, is dedicated to the idea that the mind and brain can only be fully understood by considering them within the broadest possible context. He is the author of several books, including the international bestseller *The Master and His Emissary* and, most recently, *The Matter with Things*.