THEO 240 — Historical Theology
THEO 240 tells the story behind the doctrines — how Christian teaching came to be what it is. It is a history course about ideas: rather than present the doctrines as a finished system, it watches them take shape over two thousand years, one at a time, each in the controversy that forced the church to define it. The student learns one habit and practices it in every module: to trace a doctrine through its development by asking what question forced it, what answers the church weighed, what settlement it reached, and what legacy that settlement handed forward. The course walks the great developments in turn: the rule of faith and the early creeds; the doctrine of the Trinity from the New Testament through Nicaea to the Cappadocians; the long argument over the person of Christ that ended at Chalcedon; Augustine and Pelagius on grace, sin, and freedom; the medieval theories of the atonement in Anselm and Abelard; the scholastic synthesis of Aquinas; the Reformation breaks over justification, Scripture, and the church, and the Catholic response at Trent; and the modern age from post-Reformation orthodoxy through Schleiermacher and Barth and beyond. Where a great text settled or unsettled a doctrine, the student reads it in the original words; the modern theologians, whose works remain under copyright, are described in the course’s own voice. The course is ecumenical and does not adjudicate. It traces how the one church became many — Eastern Orthodox, Roman Catholic, and the Protestant traditions — and presents each parting of the ways with both sides at their best, without ruling which reading is right. It is honest that doctrine has a history, and it takes the losing sides of every controversy seriously: Arius, Pelagius, Nestorius, and the rest are read as serious thinkers with real concerns, not as cartoon heretics, before the church’s settlement is weighed. The question of whether doctrine’s development is faithful growth, or corruption, or something else is left open for the student to weigh.
Learning outcomes
- Trace any doctrine through its development by the signature method: name the question that forced it, the answers the church weighed, the settlement it reached, and the legacy it handed forward — the signature method of the course.
- Explain what historical theology is and how doctrine develops, the rule of faith, and the early creedal development of the church.
- Trace the development of the doctrine of the Trinity from the New Testament through the Arian crisis and Nicaea to the Cappadocian settlement and Constantinople.
- Trace the long argument over the person of Christ — Apollinarianism, Nestorius and Cyril, Eutyches — to its settlement at Chalcedon.
- Trace the development of the doctrines of grace, sin, and freedom in the controversy of Augustine and Pelagius, and the medieval theories of the atonement in Anselm and Abelard, and the scholastic synthesis of Aquinas.
- Trace the Reformation developments — justification, Scripture, sacraments, and church authority — and the Catholic response at Trent, even-handedly.
- Describe post-Reformation orthodoxy and confessionalism and the modern developments from Schleiermacher through Barth, and weigh the question of whether doctrine’s development is faithful growth or corruption.
- Weigh how the Christian traditions diverged across the history of doctrine, ecumenically and without adjudicating, and trace an unseen doctrinal development by the method.
The Rule of Faith: How Doctrine Develops
Historical theology studies how Christian teaching took shape as a story that unfolded under pressure rather than as a finished system, doctrine by doctrine. This opening module marks off what historical theology is and how it differs from systematic theology, and it shows how doctrine develops: a question forces the church to define what it had long held without defining. Here the course introduces its signature method, the four moves practiced across the modules ahead — name the question that forced a doctrine, the answers the church weighed, the settlement it reached, and the legacy it handed forward. It then traces the rule of faith, the church’s early shared summary of the gospel, and how the baptismal creeds grew from it as the faith was pressed to state itself.
The Trinity
This module traces the doctrine of the Trinity from its roots in the New Testament, where Father, Son, and Spirit are each named as God and yet God is one, to the settled confession of the fourth century. It weighs the early readings the church could not accept, modalism and subordinationism, for what each was trying to protect before showing why they fell short. At its center is the Arian crisis: Arius is presented at his best, guarding the oneness and transcendence of God, before the Council of Nicaea answered with homoousios, the confession that the Son is of one substance with the Father. The module closes with the Cappadocians, whose language of one substance in three persons held the doctrine together, and the Council of Constantinople that completed the creed in 381.
The Person of Christ
How can one person be both fully God and fully man? This module follows the long argument that question provoked, beginning with an early answer the church refused, Apollinarianism, which gave Christ a divine mind in place of a human one and so left him less than fully human. It takes Nestorius seriously in his concern to keep the two natures distinct, alongside Cyril’s reply and the Council of Ephesus, which confessed Mary as Theotokos, the God-bearer. The argument settles at the Council of Chalcedon in 451, whose Definition confessed one Christ in two natures, without confusion, without change, without division, without separation, against the opposite error of Eutyches, who let the humanity be swallowed up in the divine.
Grace, Sin, and Freedom
Can a person turn to God without grace? This module traces the controversy between Pelagius and Augustine that pressed the church to define grace, sin, and human freedom. Pelagius is presented at his best, defending human responsibility and the goodness of creation against a fatalism he feared, before Augustine’s reply that grace must come first and that the will after the fall is bound. The module follows Augustine’s mature teaching on original sin and predestination, the semi-Pelagian reaction that found it too severe, and the settlement at the Council of Orange in 529, which affirmed the priority of grace while leaving much open, a debate that would return at the Reformation.
Why the God-Man? The Atonement
Why did God become man, and how does the cross save? This module traces the medieval development of the doctrine of the atonement. It begins with the older ransom motif and Anselm’s search for a better account in Cur Deus Homo, which understood sin as a debt to God’s honor that only the God-man could pay. It then takes up Abelard’s moral-influence view, the cross as the supreme demonstration of a love that moves the heart to repentance, presented as a serious account in its own right rather than a foil, and weighs what each theory captures and what each leaves unsaid.
Faith Seeking Understanding
This module follows the medieval effort to hold faith and reason together in a single understanding. It opens with the rise of the schools and universities and the scholastic method, the disputed question worked through with rigor, under Anselm’s motto fides quaerens intellectum, faith seeking understanding. At its heart is Thomas Aquinas and his great synthesis of revelation and reason, Scripture and the newly recovered Aristotle. The module reads Aquinas on the nature of sacred doctrine and on the relation of nature and grace, and considers the lasting authority his work came to carry.
The Reformation Breaks
This module traces the Reformation as a development of doctrine, beginning with the question of how a sinner is made right with God. Luther’s answer, justification by faith alone, opened a deeper question of authority that ran through Scripture, tradition, and the church. The module follows the other Reformation developments, the authority of Scripture, the disputes over the sacraments among the Reformers themselves, and the doctrine of the church in Calvin and the magisterial Reformation. It presents the Catholic response at the Council of Trent at its best, as a serious theological answer rather than a foil, and stays even-handed throughout, tracing how the one church became divided confessions without ruling which side was right.
Into the Modern Age
The final module carries the story into the modern age and closes with the course’s capstone. It begins with post-Reformation orthodoxy and confessionalism, the great Protestant confessions of Augsburg and Westminster and the rise of Protestant scholasticism. It then turns to the modern reorientation of theology: the Enlightenment challenge, Schleiermacher’s turn toward religious experience, the liberal tradition and its critics, and Barth’s reversal, with the modern theologians described fairly and the question held open of whether doctrine’s development is faithful growth, corruption, or something else. The capstone asks the student to trace an unseen development by the four-move method, carrying the habit learned in the first module out to a controversy the course has named but not yet worked through.