Jon Kabat-Zinn is an American professor of medicine and a pioneer in the field of mindfulness. He is best known for developing the Mindfulness-Based Stress Reduction (MBSR) program, which combines meditation and yoga to help individuals manage stress and improve their overall well-being. His work has significantly influenced the integration of mindfulness practices into healthcare and psychology. Kabat-Zinn founded the Center for Mindfulness in Medicine, Health Care, and Society at the University of Massachusetts Medical School. He has authored several books, including "Wherever You Go, There You Are," which popularized mindfulness for a broader audience. His teachings emphasize the importance of being present and aware in everyday life.