Dennis D. Embry, Ph.D., is the CEO/president of PAXIS Institute in Tucson, Arizona; co-investigator at the National Center on Early Adolescence in Oregon, and at the Center on Prevention and Early Intervention at Johns Hopkins University. His work on prevention of health, safety, substance abuse, violence and mental illness among children has been featured in national media such as the Today Show, Good Morning America, Life Magazine, People Magazine, the New York Times, the LA Times, the Associated Press and others. He has been a policy and program consultant for very diverse organizations on child and family issues, from Sesame Street to the Pentagon, from state governments to foreign governments, from foundations to corporations. His recent prevention work focuses on low-cost evidence-based kernels and behavioral vaccines. Dr. Embry is the author of more than 40 books and training materials for science-based prevention of children's injuries, parenting and family difficulties, violence, substance abuse and mental health and on positive youth and child development. He is the scientist and creator behind PeaceBuilders®, the PAX Good Behavior Game™ and other "best practices."