As with any other such undertaking, many people have contributed to this book. There are some without whom this book would never have happened. There are others who have helped us develop our thinking and form our ideas, both recently and over the years. And then there are those who have helped us write and hone the text. It is a long list, and we are grateful to them all.

Unfortunately, there is not enough space to name everyone, but there are some we absolutely must mention—people who have directly contributed time and effort to help us write this. At the top of this list has to be Lindsay McTeague, our brilliant copyeditor at IMD, and the fantastic Kathe Sweeney, Alina Poniewaz, Bev Miller, Carol Hartland, and Alan Venable at Jossey-Bass. Then, in alphabetical order, are Alan Arnett, Laurence Barrett, John Bassett, Georg Bauer, Stephanie Bird, Bill Byham, Jacqueline Davies, Ryan Eagar, Samantha Halverson, Peter Hartmann, Helen Hopper, Christopher Howarth, Martin Jahn, Fiona Laing, David Lawton, Andrew Lopianowski, Nandani Lynton, Rab MacIver, Mikkel Madvig, Farzana Maudarbaccus, Laura McKeaveney, Shauna McVeigh, Gabby Parry, Eyal Pavel, Elisabeth Pircher, David Ringwood, Peter Saville, Robert Sharrock, Nancy Tippins, Caroline Vanovermeire, and Jackie Wong.