CBT provides practical solutions to the broadest range of problems that people face everyday. Moreover, it embraces the responsibility to replicate its success in measurable ways in order to move the science forward. As a result, there are now empirically supported psychotherapy interventions for problems as diverse as mood disorders, substance abuse, social skills, violence and aggression, academic performance, sexual dysfunction,cognitive rehabilitation, health-related problems (e.g., eating disorders, coping with chronic illness), and stress management. There are few areas of human functioning (or few areas of psychotherapeutic treatment) that have not been helped or enhanced with CBT interventions. Due to the explosion in popularity and efficacy of interventions based on cognitive–behavioral principles, the field has become rich with handbooks devoted to a range of these specialized areas of assessment and treatment subsumed under its rubric. Many populations of individuals have been helped through these interventions, including children, adolescents, adults, and older adults. CBT procedures have been successfully applied to improve the lives of individuals, couples, groups, families, classrooms, organizations, as well as a variety of settings (e.g., homes, schools, clinics, hospitals, workplaces, correctional facilities, and rehabilitation centers).