Proto-orthodoxy did not begin as a movement. It had no founder, no founding city, and no date when it started. It congealed gradually, under specific pressures, against specific opponents. Its doctrine is the scar tissue of a long fight. Each position it eventually settled on was forced into place by an opponent it had to defeat.
Season 2 · Episode 22
The first of two episodes on how proto-orthodoxy became the catholic church. From 30 CE to roughly 190 CE: the Jewish Jesus groups, the parallel streams of Paul, the Synoptics, John, and the others, Ignatius's bishop logic, Justin Martyr's Logos theology, the forcing functions of Marcion, Valentinus, and Montanus, Irenaeus's synthesis around 180, and the Quartodeciman controversy that showed both the new authority of Rome and its limits.
The first generation, between 30 and 70 CE, is not a unified church. It is a constellation of Jewish Jesus groups. Some in Jerusalem under James the brother of Jesus, some in Galilee, Antioch, Damascus, and the diaspora synagogues. Paul branches off as the gentile mission. These groups argue with each other. Paul fights James over circumcision and Peter at Antioch over table fellowship. The Jewish War of 66 to 73 and the destruction of the Temple in 70 detach the movement from its founding world. The Jerusalem stream survives only in the margins, as Ebionites and Nazarenes east of the Jordan, before fading.
By the year 100 several streams run in parallel: the Pauline network with its letters being copied and circulated; the Synoptic stream producing Mark, Matthew, and Luke; the Johannine community in Asia Minor with the Gospel of John and the three letters; the Q tradition, the Thomas tradition, the Magdalene tradition. None of these yet think of themselves as one church. The total Christian population is perhaps seven thousand to ten thousand believers across an empire of sixty million. The streams that will later be recognised as related exist in parallel, often in the same cities, often unaware of each other.
The first place we see proto-orthodoxy taking explicit institutional shape is Ignatius of Antioch, arrested and sent to Rome around 110 CE. He writes seven letters along the way. He pushes three things harder than any previous Christian writer: the office of bishop, anti-docetism, and unity. The phrase "catholic church" appears in surviving Christian writing for the first time. Whether the monoepiscopal model was already universal or whether Ignatius is advocating for it, his letters record where the movement is going. 1 Clement, the Pastoral Epistles, Polycarp's letter, and the Didache fill in the architecture. Office. Succession. Practice. Discipline.
Justin Martyr, writing in Rome by the 150s, gives proto-orthodoxy its first major intellectual public defender. His Logos doctrine claims the entire heritage of Greek philosophy for Christianity: wherever truth has been spoken, by Socrates or Plato or anyone, it was the Logos who became Christ speaking. Pagan philosophers were unknowing Christians. Justin is beheaded under Marcus Aurelius around 165, the first major Christian intellectual to die for the faith on record.
The forcing functions arrive in the same decades. Marcion of Sinope, excommunicated in Rome around 144, publishes a closed canon and forces everyone else to answer it. Valentinus in Rome, almost elected bishop, develops the most sophisticated gnostic theology of the second century and claims the same scriptures the bishops use by reading them allegorically. The proto-orthodox answer is apostolic succession: the apostles taught publicly, not secretly, and the bishops of the major sees have received and transmitted that public teaching in documented chains. Montanus in Phrygia from the 160s preaches ongoing prophecy through himself and the women prophetesses Priscilla and Maximilla. The proto-orthodox answer is that the age of prophetic revelation ended with the apostles, that new prophecy cannot override what was given. Montanism is the forcing function that closes the canon.
Around 180 Irenaeus of Lyon, who had heard Polycarp preach as a boy, writes Against Heresies. The whole architecture comes together: one God against Marcion and the gnostics, one Christ truly in flesh against the docetists, four gospels and only four, one rule of faith publicly transmitted, one apostolic succession documented bishop by bishop. After Irenaeus, proto-orthodoxy is a recognisable ecclesiastical ideology with a doctrine, an institutional logic, and a self-understanding.
The episode closes with the Quartodeciman controversy around 190. Bishop Victor of Rome tries to excommunicate the entire Christian network of Asia Minor for celebrating Easter on the fourteenth of Nisan, the Passover date, instead of the Sunday after. Irenaeus, who agrees with Victor on the date, writes a sharp letter telling him he has no business excommunicating churches over a practice that traces back to the apostles. Victor backs down. The principle that local tradition deserves respect, even against the see of Rome, is upheld. Rome is first among bishops, but not above them. The coalition Constantine will inherit is hierarchical but not absolutist.
Key themesScar tissue of a long fight, the Jewish Jesus groups, James and the Jerusalem church, parallel streams of Paul, Synoptics, John, Ignatius and the bishop logic, the first use of catholic church, the Didache and Polycarp, Justin Martyr's Logos and the logos spermatikos, Marcion as forcing function, Valentinus and the gnostic challenge, apostolic succession as response, Montanism and the closing of the canon, Irenaeus's synthesis, four gospels and only four, the Quartodeciman controversy, Rome first among bishops but not above them.