This volume seeks to advance interest and knowledge in prevention by presenting a renewed vision suited to the needs of the U.S. population. The book emphasizes the potential of prevention to promote positive development across the lifespan and to foster social justice. This key text defines the field while offering scientists, practitioners, and graduate students a state-of-the-art resource to guide further directions in the science and practice of prevention.Part I presents the theoretical, conceptual, methodological, and ethical foundations that inform a social justice vision of prevention. Part II examines the design, conduct, and assessment of preventive interventions in a variety of contexts (community, workplace, school, family) and across various targeted psychopathologies or 'bad behaviors,' such as depression, aggressive/delinquent youth, alcoholism/substance abuse, domestic violence, poor health practices, and racism/sexism. Contributors focus on theory, research, practice, and training in prevention, as well as the philosophical, public policy, and economic issues that impact the prevention efforts by psychologists and other helping professionals.