1. Unit Type
Christianity is a civilization-scale world religion whose core identity is anchored in a shared Christological center, expressed through multiple institutional families with divergent authority structures.
2. Naming
- Emic: Ekklesia (“the Church”), “followers of Christ,” “Christians.”
- Etic: Christianity.
- Structural note: “Christian” originated as an external label (Antioch) and was later internalized. The root term is stable; downstream denominational names are historically contingent and contested.
3. Boundaries
- Inclusion: Recognition of Jesus of Nazareth as the Christ (Messiah/Lord); participation in Christian initiation (normatively baptism); identification with Christian scripture and worship.
- Exclusion: Denial of Jesus’ central salvific role; adoption of another religion as primary identity.
- Heresy & schism: Managed internally via councils, confessions, and ecclesial authority (varies by family).
- Syncretism & diaspora: Diaspora fully internal; syncretic movements are included only when self-identifying as Christian and recognized by Christian bodies.
Key boundary insight: Christianity’s boundary is Christological, not ethnic or territorial.
4. Time Span
- Origin: 1st century CE, Roman Judaea; earliest witnesses in Pauline epistles and Gospel traditions.
- Major transformations: Apostolic era → creedal consolidation (4th–5th c.) → medieval institutionalization → Reformation schisms → global missionary expansion → modern pluralization.
- Status: Active and globally expansive, with internal diversification.
5. Geography
- Origin: Eastern Mediterranean.
- Expansion corridors: Roman imperial networks; later European colonial and missionary routes.
- Distribution: Global; major centers across Europe, the Americas, Sub-Saharan Africa, and parts of Asia.
- Core vs peripheral: No single territorial core; Rome, Constantinople, and later multiple centers function historically.
6. Evidence Base
- Primary: New Testament texts; early creeds and conciliar canons; liturgies and patristic writings.
- Secondary: Roman, Jewish, and later Islamic external attestations; archaeological and epigraphic evidence.
- Limitations: Early diversity complicates reconstruction of a single “original” form.
7. Dimensional Check
- Ritual: Central (sacraments/ordinances).
- Myth/Narrative: Canonical salvation history centered on Christ.
- Doctrine: Central but variably defined across families.
- Ethics/Law: Derived from scripture and tradition; variably codified.
- Institution: Strong but plural (papal, conciliar, synodal, congregational).
- Material culture: Significant (architecture, iconography, music).
- Experiential: Important (conversion, sanctification), differently emphasized.
Anchor determination:
Christianity is anchored in Christological narrative and sacramental–institutional continuity, with unity maintained at the center and plurality at the edges.