Dr. Peter Gray is a research professor of psychology and neuroscience at Boston College with a special focus in neuroendocrinology, developmental psychology, anthropology, education—and children's natural ways of learning and the life-long value of play, about which he has published dozens of academic and popular articles. He is a frequent keynote speaker at conferences on play, education, and child development, a founding member of the nonprofit Alliance for Self-Directed Education and a founding board member of the nonprofit Let Grow. He is the author of an internationally acclaimed college introductory psychology textbook (Psychology), and of Free to Learn: Why Unleashing the Instinct to Play Will Make Our Children Happier, More Self-Reliant, and Better Students for Life (Basic Books, 2013), which has been published in 18 languages.