Christianity

Christianity Definition

Christianity is a monotheistic salvation religion grounded in the life and teachings of Jesus of Nazareth. Originating in first-century Palestine, it spread to become the dominant faith of Europe and, through colonial expansion, of much of the wider world. With around two billion nominal adherents in a multiplicity of confessional forms — Catholicism, with roughly one billion members, being the largest — it is today a genuinely global religion.

Core Beliefs

Christianity rests on belief in a personal God, held to be creator of the universe, omnipotent, omniscient, and just. Humanity, by contrast, has sinned and fallen from grace, deserving divine punishment; salvation becomes possible through the intervention of a saviour, Jesus Christ, whom Christians hold to be the Son of God and whose death constituted an atonement for human sin. Faith in Christ is believed to secure everlasting salvation, though contemporary Christianity is an extraordinarily diverse belief system whose doctrines stress good works as well as faith. The question of exactly how individuals attain salvation has proved persistently divisive — and, as Max Weber showed, sociologically consequential.

Historical Development

Christianity began as a messianic, apocalyptic movement within Judaism during the Roman occupation, born of the preaching and fate of Jesus, whom his disciples proclaimed “the Christ” (Messiah). Their experiences after his death — above all their reported encounters with him as risen — propelled the movement’s first expansion. After the destruction of Jerusalem in 70 CE, and largely through the missionary work of the apostle Paul among the Gentiles, it grew into a faith addressed to the wider Roman world. Persecuted for its first three centuries — notably under Nero, an experience that produced the institutions of martyrdom and sainthood — it spread first among the lower classes before winning favour with the powerful; Constantine established it as the religion of the empire in 313 CE. Karl Kautsky’s claim that early Christianity was a proletarian religion requires qualification. By the eleventh century a clear divide separated Western Christendom, under the bishop of Rome transformed into the pope, from Eastern Orthodoxy; the Protestant Reformation of the sixteenth and seventeenth centuries split the Western church again. Throughout, Christianity has shown a marked ability to adapt — from the waning Greco-Roman classical world, through feudalism and its medieval flowering (when monasteries were central to Western education and culture), to the pluralistic and less religious societies of modernity.

Branches and Organisation

Contemporary Christianity comprises three broad tendencies: the Western Catholic Church, resting on the primacy of Rome; the fourteen autocephalous Eastern Orthodox churches, dating from the eleventh-century schism; and the many Protestant bodies that emerged from the sixteenth century onward. Christian organisation is correspondingly complex, spanning Ernst Troeltsch’s classic types of church, sect, and denomination: Catholicism and Orthodoxy are church-type formations, while Protestantism supplies examples of all three. From the beginning Christians have been organised in hierarchically structured communities — “churches” in both the broad confessional sense and the local sense of congregations led by a pastor or priest. Like most religious movements, Christianity evolved early from a sectarian to a more institutional, less apocalyptic form, yet the dual pattern has persisted: a predominant institutional church leaving room for sectarian expressions of greater religious intensity, so that today its organisational forms range across churches, denominations, cults, and sects.

Faith, Practice, and Morality

Christian faith is canonically regulated through a system of dogmas concerning God and salvation, yet from its first encounter with Greco-Roman culture it has engaged with reason — some scholars describe it as a synthesis of a revealed Semitic religion with the rational framework of Greek philosophy. The engagement has never been simple: a permanent tension between faith and reason, and between the religion’s mystical (apophatic) and rational (cataphatic) aspects, has produced both a “religion of mystics” and a “religion of intellectuals,” each accepted as legitimate. Practice likewise balances a sacramental, communal dimension — public reading and preaching of the Bible and celebration of the sacraments — against personal prayer and introspection, with the balance varying across and within confessions. Christian morality has been comparatively strict and communitarian, emphasising love of neighbour and mutual responsibility, yet grounded in individual conscience and a personal divine calling; recurrent apocalyptic waves, reform movements, and communities of “religious virtuosi” have kept alive the tension between Christian fellowship and worldly life.

Church, Society, and Politics

Christianity has developed many models of relation to its social environment, from full integration and cooperation to sharp contrast and resistance — configurations that have shaped whole political systems. Though churches have periodically sought to “Christianise” their societies, they have more often accommodated themselves to existing conditions, frequently serving as legitimating agencies and resisting mainly when their survival was threatened; radical, socially critical currents have usually been minority positions nourished by apocalyptic expectation. Weber argued that Christianity’s insistence on the ritual equality of all believers prevented caste-like divisions that might have fractured the Western bourgeoisie, and others have credited the anti-authoritarian tendencies of seventeenth-century Protestant sects with fostering democratic values. The distinctive European tension between church and state — largely absent in Asian societies — has itself been historically formative.

Sociological Questions

Three problems dominate the sociology of Christianity. First, its origins present a puzzle — in Niklas Luhmann’s phrase, the “probability of the improbable”: everything seemed to doom the movement, from its founder’s execution to persecution and a hostile environment. Explanations have ranged from liberal biblical criticism’s stress on eschatological appeal, through Marxist accounts of hope for the miserable and Nietzsche’s charge of an inversion of values born of resentment, to recent analysis suggesting that early Christian growth rates through conversion resembled those of other religious movements, aided by class, gender, social structure, and care for the needy in times of crisis. Second, the paradoxical relation between Christianity and modernity: in The Protestant Ethic and the Spirit of Capitalism Weber traced an “elective affinity” between Protestant asceticism and capitalist development, presenting Christianity as a driver of rationalisation — yet the modernity it helped create then subjected the faith to differentiation and disenchantment, eroding its foundations. Functionalists continue to debate what modern societies would lose without it, from social integration and moral enforcement to Luhmann’s “management of contingency.” Third, secularisation: many scholars treat it as a distinctively “Christian question,” since Christianity’s own concession of autonomy to secular spheres and rational inquiry created the conditions for its possible historical demise; and, as Karl Löwith argued, many modern values are secularised Christian ones whose survival outside a religious matrix remains uncertain.

Christianity and Sociology

The relationship between the two has often been conflictual: since Comte, sociology has been suspected of presupposing religion’s dissolution, while theologians such as John Milbank have attacked the secular programme of social science as covertly violent and nihilistic. Yet there is also a long tradition of collaboration — no other religion has integrated sociological research so readily, church agencies employ sociologists, and recent scholarship has increasingly granted the “religious factor” genuine explanatory weight, sometimes analysing it through economic models of religious behaviour.