over many decades of their lives. The authors found a number of qualities that were consistent across the entire group of exemplars, including a sense of certainty about their core moral beliefs, a positive attitude toward hardship and challenge, receptivity toward new ideas and goals, a lifelong capacity for moral growth, and a strong integration of their moral values into their sense of self. This book promoted the "moral identity" theory, which maintains that moral commitment and moral action are a function of how important morality is to a person's sense of self. This theory adds an additional dimension to theories that emphasize the primary importance of moral reasoning skills (Lawrence Kohlberg), emotions (Jonathan Haidt), or cultural background (Richard Shweder). Jonathan Haidt has said of Damon that he “has long been the expert I most trust on moral development.” Damon's work also is known for its case study and interview methodology, which some believe to be more evocative than experimental studies. Damon and Colby followed up their Some Do Care study of living moral exemplars with some historical case studies of 20th century moral exemplars, described in their 2015 book The Power of Ideals. Damon's developmental research has been aimed at promoting "the character and competence of all young people growing up in today’s world . . . [to provide] guidance for parenting, for improved educational practice, and for youth development in a wide variety of community settings.” One study examined young people who exhibit a striking sense of purpose. This research has been expanded in the works of Dr. Kendall Cotton Bronk and Dr. Jenni Menon Mariano. In addition, Damon's youth purpose work is closely connected with the "positive youth development" approach pioneered by Peter L. Benson. In a series of studies with Howard Gardner and Mihaly Csikszentmihalyi, Damon examined purposeful work in several professional and business settings. Damon wrote about journalism in the book Good Work and about business success in The Moral Advantage. Damon presented his framework for good work in philanthropy in Taking Philanthropy Seriously: Beyond Noble Intentions to Responsible Giving. Damon's book The Path to Purpose was the result of Damon's twenty-five-year research program on personal identity and character in human development. The book has been widely cited as the first scientific treatment of how young people find fulfilling purposes in life. The Path to Purpose presents Damon's vision of how schools and parents can