The author is a famous Swedish teacher, honorary doctor of sciences at a number of universities. The book is based on forty years of research on religions and interreligious relations conducted by the author in Europe. It is a valuable - based solely on documents - a set of knowledge about the phenomenon of combating sects in modern society and its ideological origins. The publication is intended for those who are interested in issues of religion, religious philosophy, theology, problems of freedom of conscience, and can also be used in teaching courses "Fundamentals of Religious Studies," "History of Religion," "Evolution of Religion in the Modern World" and other religious studies disciplines, as well as in courses of disciplines taught at theological faculties and departments: "Canon Law" and "History of Local Orthodox Churches," in other similar courses.