Ross W. Greene, PhD, is a clinical psychologist and the originator of the innovative, evidence-based approach called Collaborative & Proactive Solutions (CPS), as described in his influential books The Explosive Child, Lost at School, Lost & Found, and Raising Human Beings. He developed and executive produced the award-winning documentary film The Kids We Lose. Dr. Greene was on the faculty at Harvard Medical School for over twenty years and is now founding director of the nonprofit Lives in the Balance. He is also currently adjunct Professor in the Department of Psychology at Virginia Tech. Dr. Greene has worked with several thousand kids with concerning behaviors and their caregivers, and he and his colleagues have overseen implementation and evaluation of the CPS model in countless schools, inpatient psychiatry units, and residential and juvenile detention facilities, with dramatic effect: significant reductions in recidivism, discipline referrals, detentions, suspensions, and use of restraint and seclusion. Dr. Greene lectures throughout the world and lives in Freeport, Maine.