We adhere to the New York State’s Office of Addiction Services and Supports (OASAS) definition of prevention as a pro-active, research-based, data-driven process utilizing proven-effective strategies and programs to reduce or prevent alcohol and other drug abuse in individuals, families, and communities. Our approach to alcohol and substance abuse prevention, and the conceptual framework that supports it, have evolved over time. Both are based on emerging national research findings and the state’s experiences in program development, implementation, and evaluation.