Over the last three decades, Russ Hudson has established himself as one of the top teachers and developers of the Enneagram personality typology in the world today. He has been writing and teaching full-time with The Enneagram Institute as well as on his own since 1991 and has co-authored with Don Richard Riso five best-selling books on the subject, including The Wisdom of the Enneagram and Personality Types. These books are widely considered to be not only groundbreaking contributions in the field of Enneagram studies, but also important contributions to the literature of psychological type. Beyond the books and teaching, Russ also worked for several years to develop a scientifically-validated test instrument, the Riso-Hudson Type Indicator (RHETI), now considered a standard test in the Enneagram field. He originally encountered the Enneagram through the Gurdjieff Work and sees it as a map for personal development and awareness more than as merely a system for categorizing people. He has emphasized the importance of cultivating presence and mindfulness as a foundation for authentic work with the Enneagram, and has worked to align the study of the Enneagram and spiritual practice and bring their mutual benefit into greater public awareness.