Albert Ellis, Ph.D., was the intellectual founder of all clinical approaches that now fall under the rubric of cognitive behavior therapy, and he is generally regarded as one of the most influential psychologists of the 20th century. His Rational Emotive Behavior Therapy is now practiced and taught throughout the world, along with the numerous similar therapies that it spawned. Dr. Ellis wrote 70 books and more than 600 journal articles and monographs. At the Albert Ellis Institute, which he founded and managed for more than half a century, he personally trained or supervised thousands of clinicians. As a practicing psychologist, he personally helped more than 10,000 people lead less painful and more productive lives. Dr. Ellis received dozens of awards from organizations like the American Psychological Association and American Counseling Association for his tireless work in advancing psychology, counseling, and social work. When he received his Ph.D. from Columbia University in 1947, he had already established himself as the most renowned sex therapist in the first half of the 20th century, and he then went on to revolutionize the field of clinical psychology. Dr. Ellis died July 24, 2007, while this book was in the final stages of preparation. Dr. Mike Abrams is a psychologist licensed in New York & New Jersey and has practiced psychotherapy for more than twenty five years. He is a board certified Diplomate of the American Board of Professional Psychology, he is a Fellow of the American Academy of Cognitive and Behavioral Psychology, and he is a Supervisor, Fellow and Diplomate of the Albert Ellis Institute. Lidia Dengelegi Abrams, Ph.D., is the executive director of Resolve Community Counseling Center, Inc., a private, nonprofit mental health agency. She also maintains a private clinical psychology practice and consults for the New Jersey Division of Youth and Family Services, the New Jersey Office of Parental Representation, and the New Jersey Division of Vocational Rehabilitation. Dr. Abrams has co-authored one other book with Dr. Ellis and has published research in the areas of AIDS education and prevention, eating disorders, and comparative psychotherapy efficacy. For several years, she conducted research on health care utilization at Rutgers University's Institute for Health, Health Care Policy, and Aging Research. She has a master's degree in psychology from New York University and a Ph.D. in psychology from Temple University. She is a fellow and supervisor of the Albert Ellis Institute. Dr. Abrams has taught at New Jersey City University.