Donald Robertson is a well-known author, psychotherapist, and speaker, recognized for his work in the field of cognitive-behavioral therapy (CBT) and ancient philosophy. He has written several books that explore the connections between modern psychology and Stoicism, a school of thought that emphasizes rationality and self-control. His writings aim to make these concepts accessible to a broader audience. In addition to his books, Robertson is a prominent figure in the mental health community, often sharing insights on how to apply Stoic principles in everyday life. He has contributed to various platforms, including podcasts and online courses, helping individuals improve their mental well-being through practical techniques derived from both CBT and Stoicism.