Nearly all theologians (e.g., Augustine, Calvin, Barth, Balthasar, Moltmann) centre theology on Jesus Christ, though differing in emphasis (ontological, experiential, political).
Biblical Engagement
All deeply engage with Scripture, though some (e.g., Luther, Calvin) focus on sola scriptura, while others (e.g., Schleiermacher, Gutiérrez) approach it through experience or justice.
Doctrine Development
Each theologian contributes to the clarification or expansion of Christian doctrines—whether Trinity (Athanasius, Gregory), grace (Augustine, Aquinas), or eschatology (Moltmann).
Cultural Engagement
Many responded to their context (e.g., Barth to Nazism, Bonhoeffer to discipleship under tyranny, Gutiérrez to poverty, Schleiermacher to modernity).
Legacy in Their Tradition
Each left a lasting impact in their respective tradition (e.g., Aquinas in Catholic scholasticism, Wesley in Methodism, Calvin in Reformed theology).
Institutional Church vs. Word-centred or charismatic Church
Theology of the Cross vs. Glory
Moltmann/Bonhoeffer vs. Prosperity or triumphalist models
Cruciform theology vs. victorious imagery
Engagement with Modernity
Schleiermacher embraces it; Barth, Gutiérrez critique it
Theology adapted to vs. confrontational with modern values
5. Summary Table: Comparison at a Glance
Name
Era
Tradition
Known For
In Tension With
Augustine
4th–5th c.
Catholic
Original sin, grace, two cities
Pelagius, semi-Pelagians
Aquinas
13th c.
Catholic
Thomism, reason + faith
Luther, Reformed theologians
Luther
16th c.
Protestant
Justification by faith
Catholic tradition, Erasmus
Calvin
16th c.
Reformed
Sovereignty, predestination
Arminians, Anabaptists
Wesley
18th c.
Methodist
Holiness, prevenient grace
Calvinists
Edwards
18th c.
Puritan
Revival, God’s glory
Deists, Enlightenment
Schleiermacher
19th c.
Liberal
Religion as feeling
Barth, traditionalists
Barth
20th c.
Reformed
Neo-orthodoxy, Word of God
Schleiermacher, liberals
Bonhoeffer
20th c.
Lutheran
Discipleship, ethics, martyrdom
Nazis, compromised churches
Balthasar
20th c.
Catholic
Beauty, Christocentric drama
Rahner (rationalism), critics of mysticism
Irenaeus
2nd c.
Early Church
Recapitulation, anti-Gnosticism
Gnostics
Gregory of Nazianzus
4th c.
Orthodox
Trinity, eloquent orthodoxy
Arians
Anselm
11th c.
Catholic
Ontological argument, atonement
Abelard, reformers
Cyril of Alexandria
5th c.
Orthodox
Theotokos, Christological unity
Nestorius
Maximus the Confessor
7th c.
Orthodox
Two wills of Christ
Monothelites
Pascal
17th c.
Catholic
Apologetics, paradox of man
Rationalists, Jesuits
Gutiérrez
20th c.
Catholic
Liberation theology
Vatican officials (early), conservatives
Moltmann
20th–21st c.
Reformed
Hope, crucified God
Classical theism, triumphalism
6. Final Observations
Continuity: Across 20 theologians, Christ remains central, even as methods shift—from metaphysics to mysticism, from orthodoxy to praxis.
Dialogue Across Time: Many later thinkers (Barth, Moltmann, Balthasar) explicitly engage or revise earlier doctrines (e.g., of Augustine, Aquinas).
Geographical Spread: Western dominance in Vol. 1 gives way to global contexts in Vol. 2—Latin America (Gutiérrez), Eastern Orthodoxy (Maximus, Gregory), and German post-war theology (Moltmann).
Movement of Theology: From doctrinal defence (Irenaeus) → Scholasticism (Aquinas) → Reform (Luther, Calvin) → Modernity (Schleiermacher) → Response to crisis (Barth, Moltmann) → Liberation (Gutiérrez).
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