Medieval philosophy is the philosophy that existed through the Middle Ages, the period roughly extending from the fall of the Western Roman Empire in the 5th century until after the Renaissance in the 13th and 14th centuries.[1] Medieval philosophy, understood as a project of independent philosophical inquiry, began in Baghdad, in the middle of the 8th century,[1] and in France and Germany, in the itinerant court of Charlemagne in Aachen, in the last quarter of the 8th century.[1][2] It is defined partly by the process of rediscovering the ancient culture developed in Greece and Rome during the Classical period[1] and partly by the need to address theological problems and to integrate sacred doctrine with secular learning. This is one of the defining characteristics in this time period. Understanding God was the focal point of study of the Jewish, Christian and Muslim Philosophers and Theologians.
The history of medieval philosophy is traditionally divided into two main periods: the period in the Latin West following the Early Middle Ages until the 12th century, when the works of Aristotle and Plato were rediscovered, translated, and studied upon, and the "golden age" of the 12th, 13th and 14th centuries in the Latin West, which witnessed the culmination of the recovery of ancient philosophy, along with the reception of its Arabic commentators[1] and significant developments in the fields of philosophy of religion, logic, and metaphysics.
The high medieval Scholastic period was disparagingly treated by the Renaissance humanists, who saw it as a barbaric "middle period" between the Classical age of Greek and Roman culture, and the rebirth or renaissance of Classical culture.[1] Modern historians consider the medieval era to be one of philosophical development, heavily influenced by Christian theology. One of the most notable thinkers of the era, Thomas of Aquinas, never considered himself a philosopher, and criticized philosophers for always "falling short of the true and proper wisdom".[3]
The problems discussed throughout this period are the relation of faith to reason, the existence and simplicity of God, the purpose of theology and metaphysics, and the problems of knowledge, of universals, and of individuation.[4]: 1
Medieval philosophy places heavy emphasis on the theological.[5] With the possible exceptions of Avicenna and Averroes, medieval thinkers did not consider themselves philosophers at all: for them, the philosophers were the ancient pagan writers such as Plato and Aristotle.[4]: 1 However, their theology used the methods and logical techniques of the ancient philosophers to address difficult theological questions and points of doctrine. Thomas Aquinas, following Peter Damian, argued that philosophy is the handmaiden of theology (philosophia ancilla theologiae).[4]: 35 Despite this view of philosophy as the servant of theology, this did not prevent the medievals from developing original and innovative philosophies against the backdrop of their theological projects. For instance, such thinkers as Augustine of Hippo and Thomas of Aquinas made monumental breakthroughs in the philosophy of temporality and metaphysics, respectively.
The principles that underlie all the medieval philosophers' work are:
- The use of logic, dialectic, and analysis to discover the truth, known as ratio;
- Respect for the insights of ancient philosophers, in particular Aristotle, and deference to their authority (auctoritas);
- The obligation to co-ordinate the insights of philosophy with theological teaching and revelation (concordia).
One of the most heavily debated issues of the period was that of faith versus reason. Avicenna and Averroes both leaned more on the side of reason.[dubious – discuss] Augustine stated that he would never allow his philosophical investigations to go beyond the authority of God.[6]: 27 Anselm attempted to defend against what he saw as partly an assault on faith, with an approach allowing for both faith and reason. The Augustinian solution to the faith/reason problem is to first believe, and then subsequently seek to understand (fides quaerens intellectum). This was the mantra of Christian thinkers, most especially the scholastic philosophers (Albert the Great, Bonaventure, and Thomas Aquinas).
Theology
Medieval philosophy is characteristically theological. Subjects discussed in this period include:
- The problem of the compatibility of the divine attributes: How are the attributes traditionally ascribed to the Supreme Being, such as unlimited power, knowledge of all things, infinite goodness, existence outside time, immateriality, and so on, logically consistent with one another?
- The problem of evil: The classical philosophers had speculated on the nature of evil, but the problem of how an all-powerful, all-knowing, loving God could create a system of things in which evil exists first arose in the medieval period.
- The problem of free will: A similar problem was to explain how 'divine foreknowledge' – God's knowledge of what will happen in the future – is compatible with our belief in our own free will.
- Questions regarding the immortality of the intellect, the unity or non-unity between the soul and the intellect, and the consequent intellectual basis for believing in the immortality of the soul.
- The question of whether there can be substances which are non-material, for example, angels.
Library of Light Edition 1.0 — Last revised: April 2026
From Late Antiquity to the Medieval Christian Mind
The medieval intellectual world grows from several streams converging:
Augustinian Christianity
monastic preservation
Byzantine Greek learning
Islamic philosophy
Jewish philosophy
recovery of Aristotle.
Augustine
Augustine becomes the dominant theological mind of the Latin West.
His themes include:
- memory,
- inwardness,
- illumination,
- grace,
- will,
- time,
- desire,
- City of God.
The famous inward movement:
Do not go outward; return within yourself.
makes Augustine one of the great Christian philosophers of interiority.
Boethius
Boethius stands at the threshold between antiquity and the Latin Middle Ages.
His Consolation of Philosophy preserves:
- Platonic,
- Stoic,
- Christian-adjacent wisdom
in a world where Roman political order is collapsing.
Benedict
Benedictine monasticism becomes one of the great vessels of Western transmission.
Monasteries preserve:
- Scripture,
- classical texts,
- liturgy,
- learning,
- agriculture,
- sacred time.
Gregory the Great
Gregory helps shape the religious culture of the early medieval Latin Church.
The papacy, monastic spirituality, pastoral theology, and liturgy increasingly take medieval form.
Irish and Insular Monasticism
Irish and British monastic cultures become important centers of:
- manuscripts,
- pilgrimage,
- missionary work,
- sacred learning.
Carolingian Renaissance
The court of Charlemagne supports renewed:
- education,
- manuscript copying,
- liturgical standardization,
- classical study.
John Scotus Eriugena
Eriugena represents one of the most striking early medieval Christian Neoplatonic syntheses.
He draws heavily upon:
- Pseudo-Dionysius,
- Greek patristic thought,
- procession and return.
Cathedral Schools and Universities
The intellectual world gradually shifts toward:
- cathedral schools,
- dialectic,
- universities,
- scholastic method.
Arabic and Greek Transmission
The translation movement brings Aristotle and major Arabic commentators into Latin Europe.
This changes Christian theology permanently.
Mature Scholasticism
Figures such as:
- Anselm,
- Abelard,
- Albert the Great,
- Thomas Aquinas,
- Bonaventure
develop increasingly systematic syntheses of:
faith and reason.
The Mystical Counterpoint
At the same time, Christianity produces great visionary and contemplative figures:
- Hildegard of Bingen
- Francis of Assisi
- Dominic
- Meister Eckhart
- later Rhineland mystics
- Catherine of Siena
- Teresa of Ávila
- John of the Cross.
These later figures extend beyond the earliest chronological core of Book VI, but they belong here as the continuing Christian mystical stream.
The Book therefore carries the Christian interior tradition forward even as the historical narrative approaches the Grail world.