Protagonists generally come from an Evangelical or fundamentalist background, although many have Roman Catholic, Eastern Orthodox or Ancient Oriental Orthodox roots.
The countercult movement asserts that non-Christian faiths are spiritually counterfeit and claims the authority to define "true" Christianity, and thus to define "false" Christianity. Christian apologists who write from within this movement argue that a religious body may be defined as a "cult" if its doctrines involve a denial of the teachings which they hold to be essential Christian doctrine (e.g., the doctrine of the Trinity, the person and work of Christ, salvation, etc).
Some "countercult" groups actually consider other similar groups to be non-Christian, due to additional disagreements over doctrine or the use of a different translation of the Bible. Many of the Protestant groups consider Catholicism to be a cult, due to beliefs regarding the Pope and Mary among others. Many of the Catholic groups feel the same way about Protestant groups. An extreme example, the Westboro Baptist Church, considers nearly all other churches to be cults, due to a perceived lack of sufficient condemnation of homosexuality.
Countercult literature usually expresses doctrinal or theological concerns and a missionary or apologetic purpose. It seeks to identify problems with a given group's teachings or practices and present a rebuttal emphasizing doctrinal positions in a mainstream Christian vein. Christian countercult writers also emphasize the need for the evangelization of followers of "cults", and often present advice and strategies on how Christians may evangelize among targeted groups.
Their activities and orientation vary: some are missionary and apologetically oriented, directed at current members of divergent groups, some are therapeutically oriented, directed mainly at former members of divergent groups, and others educationally oriented, directed at members of their own denomination or at the general public.
A more radical arm actively protests and attempts to disrupt meetings of churches which they have labeled as "cults."
Countercult ministries concern themselves mainly with religious groups that regard themselves as Christian, but hold beliefs which they consider to be unorthodox, including The Church of Jesus Christ of Latter-day Saints, the Unification church, Christian Science, and Jehovah's Witnesses, although some also target non-Christian groups, such as Islam, Judaism, Wicca and other Neopagan groups, New Age groups, Buddhism, Hinduism, and other Eastern religions.
The Christian countercult movement, with its emphases on apologetics and evangelism, does not constitute the totality of concerns which many Christians have about cult practices. Some Christians share concerns similar to those of the secular anti-cult movement.
The early Church in the post-apostolic period was much more involved in counter-cult activity. In fact, a good deal of the early Christian literature is devoted to the exposure and refutation of unorthodox pseudo Christian Gnostic cults. Irenaeus, Tertullian, and Hippolytus were among the greatest early Christian apologists who engaged in counter-cult activity.
In the Protestant traditions some of the earliest writings opposing unorthodox groups like Swedenborg's teachings, can be traced back to John Wesley, Alexander Campbell (Restoration movement) and Princeton theologians like Charles Hodge and Benjamin Breckinridge Warfield. The first known usage of the term "cult" by a Protestant apologist to denote a group is heretical or unorthodox is in Anti-Christian Cults by A. H. Barrington, published in 1898.
Quite a few of the pioneering apologists were Baptist pastors, like I. M. Haldeman, or participants in the Brethren, like William Irvine and Sydney Watson. Watson wrote a series of didactic novels like Escaped from the Snare: Christian Science, Bewitched by Spiritualism, and The Gilded Lie, as warnings of the dangers posed by cultic groups. Watson's use of fiction to counter the cults has been repeated by later novelists like Frank Peretti.
The early twentieth century apologists generally applied the words "heresy" and "sects" to groups like the Christadelphians, Mormons, Spiritualists, and Theosophy. This was reflected in several chapters contributed to the multi-volume work released in 1915 The Fundamentals, where apologists criticised the teachings of Charles Taze Russell, Mary Baker Eddy (Christian Science), the Mormons and Spiritualists.
One of the first prominent countercult apologists was Jan Karel van Baalen (1890-1968), an ordained minister in the Christian Reformed Church in North America. His book, The Chaos of Cults, which was first published in 1938, became a classic in the field.
In his 1955 book, Martin gave the following definition of a cult:
As Martin's definition suggests, the countercult ministries concentrate on non-traditional groups that claim to be Christian, so chief targets have been The Church of Jesus Christ of Latter-day Saints, Jehovah's Witnesses, Christian Science and the Unification Church, but also smaller groups like the Swedenborgian Church
However, many of the claims made by Martin, intended to give him an air of authority, have been proven wrong over the years. These included his use of the title "Doctor," claims of being a descendant of Brigham Young, and having inherited Young's "secret library," and of holding ordination from one or another "mainstream" Christian church. Those who rely on Martin's works now downplay these claims while accepting the "expertise" which they bolster.
Various other conservative Christian leaders—among them John Ankerberg and Norman Geisler—have emphasized themes similar to Martin's. Perhaps more importantly, numerous other well-known conservative Christian leaders as well as many conservative pastors have accepted Martin's definition of a cult as well as his understanding of the groups to which he gave that label. (Compare this definition with heresy.)
The acceptance of these alternatives to the word "cult" in Evangelicalism reflects, in part, the wider usage of such language in the sociology of religion. However, there is no unanimity about whether these terms are synonyms.
The only existing umbrella organization within the countercult movement in the USA is the EMNR (Evangelical Ministries to New Religions) founded in 1982 which has the evangelical Lausanne Covenant as governing document and which stresses mission, scholarship, accountability and networking.
A group of organizations which originated within the context of established religion is working in more general fields of cult-awareness, especially in Europe. Their leaders are theologians, and they are often social ministries affiliated to big churches. Among them are
Some independents like the international Dialog Center, and Anton Hein's Apologetics Index in Amsterdam are Evangelical Christians. Hein considers Scientology a hate group because that religious movement has, in his opinion, a long, documented history of hate and harassment activities, which—along with lying and deception—are condoned and encouraged in Scientology's own scriptures. (See, for example, Scientology's Fair Game policy.)
The members of this group are less concerned with doctrine and focus more on practices and methods, mainly targeting groups who, in their view, limit the freedom and self-determinism of their members or exploit them. Special concerns are Scientology, Unification church, Jehovah's Witnesses, VPM, but also some Europe-based NMRs and some fundamentalist charismatic groups.
In the 1990s discussions in academic missions and theological journals indicate that another trajectory is emerging which reflects the influence of contextual missions theory. Advocates of this approach maintain that apologetics as a tool needs to be retained, but do not favour a confrontational style of engagement.
The dominant method is the emphasis on detecting unorthodox or heretical doctrines and contrasting those with orthodox interpretations of the Bible and early creedal documents. Some apologists, such as Francis J. Beckwith, have emphasised a philosophical approach, pointing out logical, epistemological and metaphysical problems within the teachings of a particular group. Another approach involves former members of cultic groups recounting their spiritual autobiographies, which highlight experiences of disenchantment with the group, unanswered questions and doubts about commitment to the group, culminating in the person's conversion to Evangelical Christianity.
Pop apologists like Dave Hunt in Peace, Prosperity and the Coming Holocaust and Hal Lindsey in The Terminal Generation have tended to interpret the phenomena of cults as part of the burgeoning evidence of signs that Christ's Second Advent is close at hand. Both Hunt, and Constance Cumbey, have applied a conspiracy model to interpreting the emergence of New Age spirituality and linking that to speculations about fulfilled prophecies heralding Christ's reappearance.
Other apologists like Bob Larson blend an understanding of cults as heresies with a strongly nuanced emphasis on Satan as the energizing power behind the growth of cults. This theme has been portrayed in the anti-New Age novels by Frank Peretti (This Present Darkness and Piercing the Darkness) where demonic forces empower practitioners of New Age groups while Christians engage in spiritual warfare tactics of prayer and exorcisms to counter the groups.
Today there exist many and very diverse countercult ministries and authors, including everything between scholars and soapbox preachers, and there is no overall agreement regarding which groups are part of traditional Christianity.
Some Protestants classify Catholic, Eastern Orthodox, Seventh-day Adventist or Pentecostal churches as cults, because they allegedly have non-Biblical teachings.
Others speak out mainly against current non-Christian groups or trends in society like the New Age movement, the popularity of Harry Potter books or Halloween.
Some ministries, often led by former members, target single groups like Jehovah's Witnesses or Mormons.
Some of the criticisms of contemporary "cults" (heterodoxy, breaking up families, etc.) were, in its early days, originally directed against Christianity itself.