With the number of new religious movements present in the 1970s, Wallis classified these movements into three types according to their relationships to the outside world. The first type which is world-rejecting new religious movements is similar to sects as described by Troeltsch. Most movements of this type are not traditional and want a change in the world which seems to be evil or corrupt. The members have to obey strict rules and have to leave their social life behind them. Some of these movements are millenarian. These movements attract mostly those people who are marginalized. An example of this type of movements is The Moonies. The second type is world-accommodating movements, which are normally offshoots of a church or denomination. They neither accept nor reject the world but simply live within it. They are even tolerant of other beliefs; such an example is the Pentecostalists. The last type which Wallis classifies is the world-affirming new religious movements. These do not have any form of organization and do not have specific rules because its members believe mostly in human growth. They normally tolerate other religions, and they try to attract people mostly from the middle class through the media. Examples of these types of movements are the New Age and the Church of Scienthology.
These movements are increasing a lot. There can be various reasons which may lead to this growth. Weber argued that it can be due to the marginality within groups in society. These new movements mostly attract people because they can feel they are not receiving the rewards that they deserve. Wilson points different situations which may encourage people to turn to these new religious movements