The program was established by Jon Kabat-Zinn at the University of Massachusetts Medical School. While mindfulness has its roots in Buddhist teachings, Jon Kabat-Zinn has said that his program is not spiritually based, and is therefore open to everyone no matter what life circumstances they are in.MBSR is practiced by those old and young, sick and healthy, professionals and monks alike. Jon Kabat-Zinn has also said that the psychological principles of mindfulness, on which MBSR is based, have been most clearly articulated by those in Buddhist traditions. Today mindfulness has gained widespread practice in the medical community, and has many modern applications in health science.