A child is presented with a marshmallow and given a choice: to eat it now or wait and enjoy two later. What will they choose? And what are the implications for their behavior later in life? Walter Mischel's iconic 'marshmallow test', one of the most famous experiments in the history of psychology, demonstrated that the ability to delay gratification is crucial for a successful and fulfilling life: self-control predicts not only higher school grades but also better social and cognitive functioning, as well as a greater sense of self-esteem. It also helps manage stress, effectively pursue goals, and cope with painful emotions. But is willpower predetermined, or can it be taught? In his groundbreaking new book, Dr. Mischel draws on decades of compelling research and life examples to explore the nature of willpower, identifying the cognitive skills and mental mechanisms that enable it, and showing how these can be applied to everyday challenges. With profound implications for the choices we make in upbringing, education, public policy, and self-care, The Marshmallow Test will change the way we think about who we are and what we can become. And as Mischel argues, a life with too much self-control can be just as unsatisfying as one with too little, this book will also teach you when it's the right time to ring the bell and enjoy that marshmallow.