Aaron T Beck developed a form of psychotherapy in the 1960s and 1970s that he originally named “cognitive therapy,” a term that is often used synonymously with “cognitive behavior therapy” (CBT) by much of our field. Beck devised a structured, short-term, present-oriented psychotherapy for depression (Beck, 1964).  Since that time, he and others around the world have successfully adapted this therapy to a surprisingly diverse set of populations with a wide range of disorders and problems, in many settings and formats. Various adaptations have changed the focus, techniques, and length of treatment, but the theoretical assumptions themselves have remained constant.Cognitive behavioral therapy (CBT) is a form of psychological treatment that has been demonstrated to be effective for a range of problems including depression, anxiety disorders, alcohol and drug use problems, marital problems, eating disorders, and severe mental illness. Numerous research studies suggest that CBT leads to significant improvement in functioning and quality of life. In many studies, CBT has been demonstrated to be as effective as, or more effective than, other forms of psychological therapy or psychiatric medications (American Psychological Association, 2024).