a divine element in the individual; it is either soul, self, or true self. Cults are inherently ephemeral and loosely organized. There is a major theme in many of the recent works that show the relationship between cults and mysticism. Campbell, describing cults as non-traditional religious groups based on belief in a divine element in the individual, brings two major types of such to attentionmystical and instrumentaldividing cults into either occult or metaphysical assembly. There is also a third type, the service-oriented, as Campbell states that "the kinds of stable forms which evolve in the development of religious organization will bear a significant relationship to the content of the religious experience of the founder or founders." Dick Anthony, a forensic psychologist known for his criticism of brainwashing theory of conversion, has defended some so-called cults, and in 1988 argued that involvement in such movements may often have beneficial, rather than harmful effects, saying that "[t]here's a large research literature published in mainstream journals on the mental health effects of new religions. For the most part, the effects seem to be positive in any way that's measurable." In their 1996 book Theory of Religion, American sociologists Rodney Stark and William Sims Bainbridge propose that the formation of cults can be explained through the rational choice theory. In The Future of Religion they comment that, "in the beginning, all religions are obscure, tiny, deviant cult movements." According to Marc Galanter, Professor of Psychiatry at NYU, typical reasons why people join cults include a search for community and a spiritual quest. Stark and Bainbridge, in discussing the process by which individuals join new religious groups, have even questioned the utility of the concept of conversion, suggesting that affiliation is a more useful concept. Subcategories Destructive cults Destructive cult generally refers to groups whose members have, through deliberate action, physically injured or killed other members of their own group or other people. The Ontario Consultants on Religious Tolerance specifically limits the use of the term to religious groups that "have caused or are liable to cause loss of life among their membership or the general public." Psychologist Michael Langone, executive director of the anti-cult group International Cultic Studies Association, defines a destructive cult as "a highly manipulative group which exploits and sometimes physically and/or psychologically damages members and recruits." John Gordon Clark argued that totalitarian systems of governance and an emphasis on money making