Church (sociology of religion)

Various classifications of religious movements have been proposed by scholars. In the sociology of religion, the most widely used classification is the church-sect typology. The typology states that churches, ecclesia, denominations and sects form a continuum with decreasing influence on society. Sects are break-away groups from more mainstream religions and tend to be in tension with society.

Cults and new religious movements fall outside this continuum and in contrast to aforementioned groups often have a novel teaching. They have been classified on their attitude towards society and the level of involvement of their adherents.

This church-sect typology has its origins in the work of Max Weber. The basic premise is that there is a continuum along which religions fall, ranging from the protest-like orientation of sects to the equilibrium maintaining churches. Along this continuum are several additional types, each of which will be discussed in turn.

Many labels are commonly employed by non-sociologists to refer to religions and tend to be used interchangeably. Sociologists, when speaking technically, will not use these labels interchangeably as they are designations for religions with very specific characteristics.

These differing religions are often classified by sociologists as ideal types. Ideal types are pure examples of the categories. Because there is significant variation in each religion, how closely an individual religion actually holds as their ideal type categorisation will vary. Nevertheless, the categorisation scheme is useful as it also outlines a sort of developmental process for religions.

Johnstone provides the following seven characteristics of churches:

The classical example of a church by this definition is the Catholic Church, especially in the past, such as the State church of the Roman Empire. Today, the Catholic Church has been forced into the denomination category because of religious pluralism, or competition among religions. This is especially true of Catholicism in the United States. The change from a church to a denomination is still under way in many Latin American countries where the majority of citizens remain Catholics.

Islam is a church in countries like Saudi Arabia and Iran, where there is no separation of church and state. The Basic Law of Saudi Arabia states: "[The Constitution of Saudi Arabia is] God's Book [the Qur'an] and the Sunnah of His Prophet [Muhammad]". These nations are ruled under an official interpretation of religious law (Salafi in the case of Saudi Arabia), and the religious law predominates the legal system. Saudi Arabia, however, lacks Johnstone's criteria for an ordained clergy and a strictly hierarchical structure, although it has the ulema. In the Shi'a denominations, there is a professional clergy led by a Grand Ayatollah.

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