Our guest is William Doyle, a bestselling author and TV producer for networks including HBO, The History Channel, and PBS. Doyle is the co-author of an important new education-focused study, which he tells us about. The book is called "Let the Children Play: How More Play Will Save Our Schools and Help Children Thrive." As was noted of this work by Michael Rich, an associate professor of Pediatrics at Harvard Medical School: "Sahlberg and Doyle whack us in the head with the reality that 21st-century skills require old-fashioned learning as children. Play is the analog of life -- observing the world, identifying challenges, taking risks, failing, problem-solving again and again, struggling to find consensus with others, absorbing defeats with grace, and celebrating victories with exuberance. What builds successful adults is the ability to rise undaunted to opportunities, build relationships, feed curiosity, and seize the joy that is at the heart of learning and of living."