Mark A. Mattaini is associate professor at the JaneAddams College of Social Work, University of Illinois at Chicago.Editor of the scientific journal Behavior and Social Issues,he is the author or editor of ten books, including PEACE POWER forAdolescents: Strategies for a Culture of Nonviolence (NASW Press)and Finding Solutions to Social Problems: Behavioral Strategies forChange (American Psychological Association). Mattaini is theprincipal developer of the behavior analytic PEACE POWER strategy,which has been presented and implemented in at least twelve Americanstates, as well as two Canadian provinces, and was recently introducedin a UNESCO-funded project in Brazil.