We thank the many people who have contributed to our thinking, experience, and lives—from the highest levels of corporate leadership to the deepest depths of the Grand Canyon. The journey to this book has taken decades to complete and we had the opportunity to encounter many remarkable people along the way. Too many to name, too important to forget, they made the book possible.

Our sincere thanks to Jennifer Simon for believing in this idea and joining us on this expedition into the heart of permanent whitewater, as well as the wonderful editorial and marketing staff at FT Press.

Thanks to Steve Bowman and Lori Young for their insightful comments on earlier versions and Linda Delbusso for assistance with notes.

We would particularly ...

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