The Conciliar Period and the Pre-Islamic Christian World

10 min read · 1,915 words

The previous chapter showed that Christianity was already in place by 100 AD. This chapter walks through the conciliar period (the seven ecumenical councils from 325 to 787) and describes the state of the Christian world at the time of Muhammad’s ministry in early seventh-century Arabia.

The chapter has two parts. The first is a summary of each council, what doctrinal question it addressed and how the church responded. The second is a survey of the Christianity that Muhammad’s contemporaries actually had access to: where it was, what it taught, who its leaders were. The Quranic engagement with Christian doctrine (the anti-Trinity verses, the crucifixion denial, the description of the Trinity at Q 5:116) misdescribes this developed orthodoxy. It is not engaging some other Christianity that no longer exists.

The seven ecumenical councils

The seven councils that the Eastern Orthodox Church recognizes as ecumenical, binding on the whole church:

The First Council of Nicaea (325)
The First Council of Constantinople (381)
The Council of Ephesus (431)
The Council of Chalcedon (451)
The Second Council of Constantinople (553)
The Third Council of Constantinople (680-681)
The Second Council of Nicaea (787)

The first six fall in the period of this chapter. The seventh falls after Muhammad’s death but before Islamic political control over the Christian East was consolidated.

Nicaea I (325): the divinity of the Son

The convening question was the teaching of Arius, who held that the Son of God was a created being, not eternal and not consubstantial with the Father. The council condemned Arianism and articulated the Nicene Creed: the Son is “begotten not made, of one substance (homoousios) with the Father.”

Constantine convened the council and presided at the opening, but the bishops themselves debated and decided. The doctrine was the church’s existing teaching, formulated against the Arian departure.

Constantinople I (381): the divinity of the Holy Spirit

The convening question was the teaching of the Pneumatomachi, who held that the Holy Spirit was a created being subordinate to the Father and the Son. The council condemned this position and expanded the Nicene Creed to include a full article on the Spirit: “the Lord, the Giver of Life, who proceeds from the Father, who together with the Father and the Son is worshipped and glorified.”

The full Trinitarian doctrine, one God in three persons each fully divine, was now articulated. The Nicene-Constantinopolitan Creed is the standard creed of the Eastern Orthodox Divine Liturgy to this day.

Ephesus (431): the Theotokos

The convening question was the teaching of Nestorius, the Patriarch of Constantinople, who held that the divine and human in Christ were two distinct persons (not just two natures in one person), and that Mary should be called Christotokos (Christ-bearer) rather than Theotokos (God-bearer).

The council condemned Nestorianism and affirmed Theotokos as the proper Marian title. Mary bore the one person of Christ, who is God incarnate.

The Nestorian Christology survived outside the Roman Empire, where it became the doctrine of the Church of the East. The Church of the East had its center at Seleucia-Ctesiphon in Persia, spread through Central Asia along the Silk Road, and reached China by 635 AD. At the time of Muhammad, it was the dominant form of Christianity in the Persian Empire.

Chalcedon (451): two natures, one person

The convening question was the teaching of Eutyches, who held that the divine and human in Christ were so united that the human nature was absorbed into the divine. The council condemned this position and articulated the Chalcedonian Definition: Christ is “in two natures, without confusion, without change, without division, without separation.”

The Chalcedonian formula is the Christological foundation of the Eastern Orthodox Church (and, by communion, the Roman Catholic Church). Two natures (divine and human), one person (the eternal Son), and the four “withouts” make orthodox Christology precise.

The Chalcedonian Definition was rejected by churches in Egypt (Coptic Orthodox), Syria (Syriac Orthodox), Armenia (Armenian Apostolic), Ethiopia (Ethiopian Orthodox), and India (Malankara Orthodox). These churches preserve a Miaphysite Christology: one nature out of two, not exactly the same as Chalcedon but not the absorption-Monophysitism that Chalcedon condemned. The post-Chalcedonian split between Chalcedonian and Miaphysite churches has persisted ever since.

Constantinople II (553): clarifying Chalcedon

A refinement council convened by the Emperor Justinian to address residual Christological disputes following Chalcedon. The council condemned certain Antiochene Christological writings as Nestorian-leaning and clarified that Chalcedon was not. It was a sharpening of the orthodox position, not a new departure.

Constantinople III (680-681): the two wills

The convening question was Monothelitism, a political-theological compromise that held that Christ had two natures but only one will. The position was incoherent: a real human nature implies a real human will. The council condemned Monothelitism and affirmed that Christ has two wills (divine and human), with the human will in perfect alignment with the divine.

By this point Muhammad had died (632) and the initial Islamic conquests had taken Syria, Palestine, and Egypt from the Roman Empire. The doctrinal work of the church continued in the surviving Roman territory and in the formerly Roman territories now under Islamic political control.

The pre-Islamic Christian world

By the time of Muhammad’s ministry (around 610 to 632), Christianity was vast, theologically articulated, sacramentally organized, and globally distributed. The standard breakdown:

The Eastern Roman (Byzantine) Empire was officially Chalcedonian. Its religious life was organized through the patriarchates of Constantinople, Antioch, Alexandria, and Jerusalem, with the bishop of Rome having a primacy of honor and (in the Roman Catholic reading) a primacy of jurisdiction in the West.

The Western Empire had fallen politically in 476, but Latin Christianity continued under the bishop of Rome. The barbarian kingdoms in Spain, Gaul, Italy, and Britain were either Chalcedonian or in the process of converting to Chalcedonian Christianity from Arianism.

Coptic Egypt was Miaphysite. The Coptic Orthodox Patriarchate of Alexandria preserved the theological work of Athanasius and Cyril, the monastic foundations of Antony and Pachomius, and the rich Coptic liturgical tradition. At the time of Muhammad, Egypt was overwhelmingly Christian.

Syriac Christianity in Syria and Mesopotamia was substantially Miaphysite. The Syriac Orthodox Patriarchate of Antioch had its own theological and liturgical tradition, parallel to the Chalcedonian patriarchate of Antioch.

The Church of the East had its center in the Persian Empire and spread through Central Asia and into China. It preserved the Nestorian Christology and a distinctive theological tradition.

The Aksumite kingdom of Ethiopia had been Christian since the fourth century. The Ethiopian Orthodox Church was Miaphysite and in communion with the Coptic Orthodox Church. Notably, Muhammad’s early followers fled to Aksum during the Quraysh persecution; the Christian king of Aksum gave them protection. This is recorded in Islamic tradition.

Armenian Christianity had been the state religion since the early fourth century. The Armenian Apostolic Church was Miaphysite, with its own catholicos.

Indian Christianity traced its origins to the Apostle Thomas (the Mar Thoma Christians of Kerala). The community is documented from at least the sixth century AD and was in communion with the Church of the East.

Pre-Islamic Arabian Christianity existed in substantial pockets. The kingdom of Himyar in Yemen had been Christian for periods. The city of Najran in southwestern Arabia was a major Christian center; its Christians were Miaphysite, having received their tradition through Ethiopian and Syriac connections. The Ghassanid kingdom on the Roman frontier (modern Jordan and Syria) was largely Miaphysite Christian. The Lakhmid kingdom on the Persian frontier (modern Iraq) was substantially Christian under the influence of the Church of the East.

The Christianity available to Muhammad and his contemporaries in Arabia was either Chalcedonian (Byzantine, partly Ghassanid), Miaphysite (Coptic, Syriac, Armenian, Ethiopian, Najranite), or the Church of the East (Persian, partly Lakhmid). All three traditions were:

Trinitarian (one God in three persons)
Sacramental (baptism, Eucharist as central rites)
Monastic (with substantial ascetic communities)
Christologically articulate (after multiple ecumenical councils)
Globally distributed and politically organized

The Quranic engagement misdescribes this Christianity

The Quranic anti-Christian verses do not engage the Christianity Muhammad’s contemporaries actually had.

Q 5:73 condemns those who say “Allah is one of three.” No Christian church teaches this. The orthodox doctrine is one God in three persons, not three deities.

Q 5:116 condemns the worship of “Jesus, son of Mary, and his mother as two deities besides Allah.” No Christian church teaches this. The doctrine the verse describes is the doctrine of the Collyridians, a small heretical sect that worshipped Mary, documented and rejected by Epiphanius in the fourth century. The Eastern Orthodox and Roman Catholic churches honor Mary as Theotokos (the God-bearer, the title formally articulated at Ephesus in 431) but explicitly distinguish honor from worship; the worship due to God alone is never offered to Mary in orthodox Christianity.

Q 4:171 tells Christians not to say “three” and correctly identifies Jesus as “the Word of Allah and a Spirit from Him.” The instruction not to say “three” misdescribes the orthodox doctrine, which is not “three” gods but one God in three persons.

Q 4:157 denies the crucifixion. The crucifixion was the central historical fact of Christian theology from the apostolic period and was universally affirmed in all the Christian communities Muhammad’s contemporaries would have known.

The orthodox Muslim apologist sometimes argues that the Quran addresses corrupt or heretical Christians who existed in Arabia, not the orthodox Christianity articulated by the councils. The historical evidence does not support this. The Christianity available in seventh-century Arabia was the developed orthodox Christianity of the conciliar period, in Chalcedonian, Miaphysite, or Church of the East form. Each of these traditions held the doctrines the Quran misdescribes.

What this means for the whole chain

The chain is complete with this chapter.

The manuscript evidence preempts the tahrif dodge.
The Trinitarian framework is rooted in the Old Testament.
The messianic prophecies are preserved in pre-Christian manuscripts.
Jesus is historically attested and his character matches the messianic profile.
His life fulfills the converging set of prophecies.
The Cross is the place where God’s justice and mercy meet.
The Resurrection is the best historical explanation of the four facts.
The apostles died rather than recant what they personally witnessed.
The Trinity, the bishops, and the sacraments were in place by 100 AD.
The Christianity the Quran condemns is not the Christianity that actually existed.

For a Muslim reader, the cumulative case is that orthodox Christianity is the true religion that the Quran’s engagement with prior scripture and prior tradition presupposes but misdescribes. The path forward is described in the Transition Pathway, with the Eastern Orthodox Church (specifically the Antiochian Orthodox Patriarchate for cultural and liturgical continuity) as the recommended destination.

For a Christian reader, this section provides the scholarly substance behind the negative case the Foundations section makes against Islam. The negative case and the positive case together constitute the structural argument the rest of the project rests on.