Thomas Anthony Harris was an American psychiatrist and author best known for his groundbreaking self-help book "I'm OK, You're OK," published in 1967. The work became an international bestseller and introduced Transactional Analysis to mainstream audiences, cementing Harris's reputation as a influential figure in popular psychology. His follow-up book, "Staying OK," co-authored with his wife Amy Bjork Harris in 1985, further expanded on these psychological concepts.
Harris specialized in accessible explanations of complex psychological theories, particularly focusing on interpersonal relationships and personal growth. His writing blended clinical expertise with practical advice, making his works appealing to both general readers and professionals. Throughout his career, Harris remained committed to demystifying psychology and promoting mental well-being through his publications and lectures.