Religious denomination in the context of "Eastern Churches"

Sunni Islam is the largest branch of Islam and the largest religious denomination in the world. It holds that Muhammad did not appoint any successor and that his closest companion Abu Bakr (r. 632–634) rightfully succeeded him as the caliph of the Muslim community, being appointed at the meeting of Saqifa. This contrasts with the Shia view, which holds that Muhammad appointed Ali ibn Abi Talib (r. 656–661) as his successor. Nevertheless, Sunnis revere Ali, along with Abu Bakr, Umar (r. 634–644) and Uthman (r. 644–656) as 'rightly-guided caliphs'.

The term Sunni means those who observe the sunna, the practices of Muhammad. The Quran, together with hadith (especially the Six Books) and ijma (scholarly consensus), form the basis of all traditional jurisprudence within Sunni Islam. Sharia legal rulings are derived from these basic sources, in conjunction with consideration of public welfare and juristic discretion, using the principles of jurisprudence developed by the four legal schools: Hanafi, Hanbali, Maliki and Shafi'i.

Western Christianity is one of two subdivisions of Christianity (Eastern Christianity being the other). Western Christianity is composed of the Latin Church and Western Protestantism, together with their offshoots such as the Old Catholic Church, Independent Catholicism and Restorationism.

The large majority of the world's 2.3 billion Christians are Western Christians (about 2 billion: 1.3 billion Latin Catholic and 1.17 billion Protestant). One major component, the Latin Church, developed under the bishop of Rome. Out of the Latin Church emerged a wide variety of independent Protestant denominations, including Lutheranism and Anglicanism, starting from the Protestant Reformation in the 16th century, as did Independent Catholicism in the 19th century. Thus, the term "Western Christianity" does not describe a single communion or religious denomination but is applied to distinguish all these denominations collectively from Eastern Christianity.

Jewish religious movements, sometimes called "denominations", include diverse groups within Judaism which have developed among Jews from ancient times. Samaritans are also considered ethnic Jews by the Chief Rabbinate of Israel, although they are frequently classified by experts as a sister Hebrew people, who practice a separate branch of Israelite religion. Today in the West, the most prominent divisions are between traditionalist Orthodox movements (including Haredi ultratraditionalist and Modern Orthodox branches) and modernist movements such as Reform Judaism originating in late 18th century Europe, Conservative (Masorti) originating in 19th century Europe, and other smaller ones, including the Reconstructionist and Renewal movements which emerged later in the 20th century in the United States.

In Israel, variation is moderately similar, differing from the West in having roots in the Old Yishuv and pre-to-early-state Yemenite infusion, among other influences. For statistical and practical purposes, the distinctions there are based upon a person's attitude to religion. Most Jewish Israelis classify themselves as "secular" (hiloni), "traditional" (masortim), "religious" (dati) or ultra-religious (haredi).

Eastern Christianity comprises Christian traditions and church families that originally developed during classical and late antiquity in the Eastern Mediterranean region or locations further east, south or north. The term does not describe a single communion or religious denomination. Eastern Christianity is a category distinguished from Western Christianity, which is composed of those Christian traditions and churches that originally developed further west.

Major Eastern Christian bodies include the Eastern Orthodox Church and the Oriental Orthodox Churches, along with those groups descended from the historic Church of the East (also called the Assyrian Church), as well as the Eastern Catholic Churches (which are in communion with Rome while maintaining Eastern liturgies), and the Eastern Protestant churches. Most Eastern churches do not normally refer to themselves as "Eastern", with the exception of the Assyrian Church of the East and its offshoot, the Ancient Church of the East.

Ordination is the process by which individuals are consecrated, that is, set apart and elevated from the laity class to the clergy, who are thus then authorized (usually by the denominational hierarchy composed of other clergy) to perform various religious rites and ceremonies. The process and ceremonies of ordination may vary by religion and denomination. One who is in preparation for, or who is undergoing, the process of ordination is sometimes called an ordinand. The liturgy used at an ordination is commonly found in a book known as an Ordinal which provides the ordo (ritual and rubrics) for celebrations.

Endogamy is the cultural practice of marrying within a specific social group, religious denomination, caste, or ethnic group, rejecting any from outside of the group or belief structure as unsuitable for marriage or other close personal relationships. Its opposite, exogamy, describes the social norm of marriage outside of the group.

Endogamy is common in many cultures and ethnic groups. Several religious and ethnic religious groups are traditionally more endogamous, although sometimes mating outside of the group occurs with the added dimension of requiring marital religious conversion. This permits an exogamous marriage, as the convert, by accepting the partner's religion, becomes accepted within the endogamous group. Endogamy may result in a higher rate of recessive gene–linked genetic disorders.

Religious conversion is the adoption of a set of beliefs identified with one particular religious denomination to the exclusion of others. Thus "religious conversion" would describe the abandoning of adherence to one denomination and affiliating with another. This might be from one to another denomination within the same religion, for example, from Protestant Christianity to Roman Catholicism or from Shi'a Islam to Sunni Islam. In some cases, religious conversion "marks a transformation of religious identity and is symbolized by special rituals".

People convert to a different religion for various reasons, including active conversion by free choice due to a change in beliefs, secondary conversion, deathbed conversion, conversion for convenience, marital conversion, and forced conversion. Religious conversion can also be driven by practical considerations. Historically, people have converted to evade taxes, to escape military service or to gain political representation.

Identity politics is politics based on a particular identity, such as ethnicity, race, nationality, religion, denomination, gender, sexual orientation, social background, political affiliation, caste, age, education, disability, opinion, intelligence, and social class. The term encompasses various often-populist political phenomena and rhetoric, such as governmental migration policies that regulate mobility and opportunity based on identities, left-wing agendas involving intersectional politics or class reductionism, and right-wing nationalist agendas of exclusion of national or ethnic "others".

The term identity politics dates to the late twentieth century, although it had precursors in the writings of individuals such as Mary Wollstonecraft and Frantz Fanon. Many contemporary advocates of identity politics take an intersectional perspective, which they argue accounts for a range of interacting systems of oppression that may affect a person's life and originate from their various identities. To these advocates, identity politics helps center the experiences of those they view as facing systemic oppression so that society can better understand the interplay of different forms of demographic-based oppression and ensure that no one group is disproportionately affected by political actions. Contemporary identity labels—such as people of specific race, ethnicity, sex, gender identity, sexual orientation, age—are not mutually exclusive but are, in many cases, compounded into one when describing hyper-specific groups. An example is that of African-American homosexual women, who can constitute a particular hyper-specific identity class.