Rational Emotive Behavior Therapy (REBT) is based on the idea that emotional disturbances stem from irrational beliefs rather than external events, emphasizing the importance of a person's belief system in shaping their emotional responses. Developed by Albert Ellis, REBT aims to help individuals identify and dispute these irrational beliefs, fostering clearer and more rational thinking to improve emotional and behavioral outcomes. The therapy utilizes techniques like self-help forms, coping statements, and emotional insight to guide clients toward unconditional self-acceptance and effective problem-solving.