Religious fundamentalism is characterized by a rigid, literal interpretation of sacred texts and a strict adherence to traditional religious doctrines. It often emerges as a reaction against modernization and secularization, with proponents seeking to restore what they perceive as the original, authentic, and foundational principles of their faith in contemporary society.

In his work 'The Elementary Forms of Religious Life', Durkheim argued that religion is fundamentally a social phenomenon. He believed that religion serves to bind individuals together into a moral community through shared rituals and beliefs, thereby reinforcing social solidarity.

In functionalist theory, manifest functions are the recognized and intended consequences of any social pattern. Since the primary, stated purpose of religion is to provide spiritual meaning and define the divine for its adherents, this is considered a manifest function. Latent functions, by contrast, would be the unintended or unrecognized consequences, such as providing social networking or community cohesion.

Herberg's seminal work, 'Protestant-Catholic-Jew,' argued that religion in America functioned as a way for immigrant groups to assimilate. He observed that religious affiliation became a primary marker of American identity, where the specific theological differences between faiths were downplayed in favor of a shared 'American way of life' and a convergence of moral values across major denominations.

Grace Davie's concept of 'believing without belonging' suggests that while formal institutional participation (church attendance) has declined in Western Europe, many individuals still maintain personal religious beliefs. This indicates that secularization is not necessarily a total abandonment of faith, but rather a shift in how religion is practiced and expressed outside of traditional, organized church structures.

Secularization refers to the declining influence of religious institutions and values in public life. Some sociological perspectives argue that as traditional religious frameworks weaken, social cohesion may decrease, potentially leading to higher rates of divorce, substance abuse, and challenges within educational systems as traditional moral anchors are replaced by more individualistic or secular norms.

Religious beliefs are the specific statements or ideas that members of a particular religion hold to be true. These beliefs form the foundation of a faith system, distinguishing it from rituals, which are the actions performed, or experiences, which refer to the subjective feelings of connection to the divine.

Predestination is the theological doctrine central to Calvinism, asserting that God has eternally chosen those whom He will save. While Lutheranism acknowledges divine sovereignty, Calvinism emphasizes the absolute decree of God regarding salvation more strictly, making it a defining characteristic that differentiates the two branches of Protestantism.

Liberation theology emerged in the 1960s primarily within the Roman Catholic Church in Latin America. It emphasizes the role of the church in addressing the social, political, and economic concerns of the poor and oppressed, interpreting the gospel through the lens of social justice and the struggle for liberation from systemic poverty.

Simple supernaturalism refers to the belief in impersonal, diffuse supernatural forces that inhabit the natural world. The concept of 'mana'—a spiritual life force or energy found in objects, people, or places—is a classic anthropological example of this belief system, which differs from theism, where supernatural beings are personalized and active in human affairs.