Great Schism (1054)
The formal split between Roman Catholic and Eastern Orthodox Christianity. How religious divisions create civilizational fault lines that persist for a millennium and continue to shape geopolitics today.
What Happened
The Christian church split over theology (filioque clause), authority (papal supremacy vs. conciliarism), and culture (Latin West vs. Greek East). The split hardened through the Crusaders’ sack of Constantinople in 1204.
Why It Matters
The Schism created the two civilizational blocs that still compete:
- Western civilization (Catholic → Protestant → secular liberal)
- Orthodox civilization (Byzantine → Russian third-rome-concept)
The Ukraine conflict sits directly on this fault line. NATO expansion is (in Russian Orthodox framing) the continuation of the Western encroachment that began with the Schism.
Related
- fall-of-constantinople - The Second Rome falls
- third-rome-concept - Moscow inherits the mission
- russian-orthodox-eschatology - The theology of the Other Side
- historical-patterns-moc - Other patterns