The biblical canon was decided by political power struggles — councils and emperors picked which books served orthodoxy and suppressed the rest, like the Gospel of Thomas.

Why people find it persuasive

Popular accounts, especially since Dan Brown's The Da Vinci Code, describe Constantine and church councils voting on which books would be scripture, discarding rival gospels for political reasons. Documents like the Nag Hammadi library show real diversity of early Christian belief that got centralized out of existence. It looks like the canon reflects the winners of a power struggle rather than a neutral historical process.

Important distinctions

• • Popular myth (Constantine at Nicaea voting on the canon) versus actual historical process
• • Formal councils that later ratified a canon versus the centuries-long process of recognition beforehand
• • Criteria used (apostolic origin, widespread use, theological consistency) versus arbitrary imperial preference
• • Gnostic gospels' actual content and dating versus assumptions about their suppression
• • Local variation in disputed books (the 'antilegomena') versus core books never seriously contested

Christian response

• • The claim that Constantine or the Council of Nicaea (325 AD) decided the canon is a documented historical myth; Nicaea's surviving records concern the Arian controversy and the date of Easter, not canon lists. Bruce Metzger's The Canon of the New Testament (1987), still the standard scholarly reference, traces canon formation as a gradual process of recognition beginning in the first and second centuries, well before any imperial involvement, with figures like Irenaeus (c. 180 AD) already citing the four Gospels as authoritative.
• • The core of the New Testament — the four Gospels, Acts, Paul's major letters — was essentially settled in practice by the mid-second century, attested in writers like Justin Martyr and the Muratorian fragment (c. 170-200 AD), a full century and a half before Constantine. What later councils (Hippo 393, Carthage 397) did was formally ratify lists already in wide, longstanding use, not select among live contenders on political grounds.
• • The criteria applied were apostolic origin or close apostolic association, consistency with the 'rule of faith' taught across dispersed churches, and widespread liturgical use, not doctrinal convenience for the state. Books like the Gospel of Thomas were excluded not because they threatened Constantine's empire but because they were demonstrably later (most scholars, including critical ones like Ehrman, date Thomas to the mid-to-late second century), lacked traceable apostolic provenance, and taught a gnostic theology in tension with the earliest, widely attested apostolic teaching.
• • There genuinely was diversity in earliest Christianity, and a handful of books (Hebrews, James, 2 Peter, Revelation) were disputed in some regions for a time — this is honestly documented by Eusebius in his Ecclesiastical History (c. 325 AD), not hidden. That real, acknowledged uncertainty about edge cases is very different from the popular narrative of a single political decision suppressing equally credentialed alternatives.
• • None of this means canon formation was free of theological argument or that every included book's authorship is uncontested among scholars; it means the 'political suppression' narrative substantially misrepresents both the timeline and the criteria, substituting a novelistic story for the more mundane but better-attested reality of gradual, bottom-up recognition.

Christian counterresponse

Institutional reach can explain differential survival and copying rates without implying the theological criteria were arbitrary or invented after the fact; the proto-orthodox position had wider reach substantially because it traced to the actual apostolic churches (Rome, Antioch, Ephesus, Alexandria) with continuous historical succession, which is itself evidence relevant to reliability, not merely raw political advantage.