Philip Zimbardo is Professor Emeritus of Psychology at Stanford University and has also taught at Yale, NYU and Columbia, and is past president of the American Psychological Association. He is renowned for his world-famous Stanford Prison Experiments, his studies on shyness and, more recently, for his breakthrough work on time. He also presented the award-winning video series Discovering Psychology. He lives in San Francisco but travels widely. See his website www.zimbardo.com John Boyd received his doctorate in psychology from Stanford University, where he worked closely with Philip developing the Zimbardo Time Perspective Inventory. He is currently Research Manager at Google.