John Duns Scotus: A Bridge Between Medieval and Modern Thought

John Duns Scotus (c. 1266-1308) is one of those thinkers whose name might not ring as many bells as Aristotle or Aquinas, yet his ideas fundamentally reshaped how Western philosophy understands existence, individuality, and freedom. A Scottish Franciscan friar who earned the title Doctor Subtilis – the Subtle Doctor – for the sheer precision of his reasoning, Scotus built a philosophical system that challenged the dominant Thomistic framework and opened doors that later modern thinkers would walk through. His work sits at a pivotal crossroads: deeply rooted in the Augustinian and Aristotelian traditions of the medieval period, yet strikingly forward-looking in ways that anticipate concerns central to modern philosophy.

Who was John Duns Scotus? 🔗

Scotus was born near the town of Duns in Scotland around 1266. He entered the Franciscan Order as a young man and studied at Oxford, where he began lecturing on Peter Lombard’s Sentences – the standard theological textbook of the era. He later moved to Paris, was briefly exiled due to a political conflict between King Philip IV and Pope Boniface VIII, and eventually returned to receive his master’s degree around 1305. He was transferred to Cologne in 1307 and died there on November 8, 1308, at roughly 42 years of age.

Despite his short life, Scotus produced a vast body of work, most notably the Ordinatio (a revised version of his Oxford lectures) and the treatise De Primo Principio (On the First Principle). His writings are technically dense, often requiring multiple readings even by specialists, but they address some of the deepest questions in metaphysics, theology, and ethics.

The univocity of being: Scotus’s most famous doctrine 🔗

The single idea most associated with Scotus is the univocity of being. This doctrine holds that the concept of “being” applies in the same fundamental sense to everything that exists – God, human beings, animals, stones, everything. When we say “God exists” and “a cat exists,” the word “exists” carries the same core meaning in both statements.

This was a radical departure from Thomas Aquinas. Aquinas had argued for the analogy of being: when we say God is “good” and a person is “good,” the word “good” does not mean the same thing in both cases. It has a related but different meaning when applied to God versus creatures. Scotus disagreed. He argued that unless we use concepts like “being” and “goodness” with the same meaning for God and creatures, we cannot reason meaningfully about God at all.

Why univocity matters 🔗

Scotus’s reasoning here is sharp. He pointed out that when we determine whether something is a “pure perfection” – a quality that is always better to have than not have, like wisdom or goodness – we first observe it in creatures. Then we ascribe it to God. But this process only works if the concept we form from observing creatures is the same concept we apply to God. Otherwise, we are not really saying anything about God; we are just using the same word for two unrelated things.

This does not mean Scotus thought God and creatures are the same kind of thing. He was emphatic that being exists in two radically distinct modes: infinitely in God and finitely in creatures. The concept of being is shared, but the way it is realized differs enormously. Scotus thus preserved divine transcendence while making theology rationally coherent – a delicate balance that won both admirers and fierce critics.

The univocity thesis also had major consequences for metaphysics as a discipline. If “being” is truly univocal, then metaphysics can study “being as being” as a single, unified science that encompasses both the finite and the infinite. Without a common concept of being applicable to all that exists, the very possibility of metaphysics as a universal science becomes doubtful.

The formal distinction: between the real and the conceptual 🔗

Scotus introduced a distinctive type of distinction that sits between two extremes already recognized in medieval philosophy. A real distinction holds between things that can be separated – at least in principle, even if only by divine power. A conceptual distinction, on the other hand, exists only in our minds. Scotus identified a third category: the formal distinction (distinctio formalis a parte rei).

Two aspects of a thing are formally distinct when they are inseparable in reality – you cannot pull them apart – but they have genuinely different definitions or accounts. Consider the human soul: its will and its intellect cannot be separated from each other (they are both part of the same soul), yet the will is a free power while the intellect is not. This is not just a difference in how we think about them; it reflects something real about the soul’s internal structure. As the Internet Encyclopedia of Philosophy explains, formally distinct items are not separate things but different “formalities” or “realities” within one and the same thing.

Applications of the formal distinction 🔗

Scotus used this tool extensively. He applied it to the relationship between a thing’s common nature and its individual identity, between the genus and specific difference within a species, and – most controversially – between the divine attributes within God. The formal distinction allowed Scotus to say, for example, that God’s wisdom and God’s goodness are not merely different names for the same thing (as strict divine simplicity might require), nor are they separate entities in God. They are formally distinct aspects of a single, unified divine reality.

This idea drew heavy criticism, especially from William of Ockham, who saw it as multiplying entities unnecessarily. But for Scotus, the formal distinction was an essential analytical tool – a way to honour the genuine complexity of things without breaking them apart into separate beings.

Haecceity: the principle of individuation 🔗

One of Scotus’s most original contributions is his answer to the problem of individuation: what makes one individual thing this particular thing, rather than just another instance of its kind? What makes Socrates Socrates, rather than just another human being?

Previous thinkers had proposed various answers. Aquinas argued that matter individuates things – what makes this statue different from that statue is the particular lump of bronze it is made from. Others pointed to quantity or actual existence as the individuating factor. Scotus rejected all of these. He argued that individuation requires a positive principle added to the common nature of a species, something he called the individual difference or, in later scholastic usage, haecceitas – “thisness.”

Haecceity is not a property you can describe or define in general terms. It has no conceptually specifiable content. It does not add any further “whatness” to a thing; it simply determines a nature to be this unrepeatable instance of that nature. The common nature of humanity tells us what Socrates is; his haecceity tells us which one he is.

The relationship between haecceity and common nature 🔗

Scotus held that the common nature and the haecceity within an individual are really identical but formally distinct. You cannot peel them apart, but they have genuinely different roles and accounts. The common nature accounts for why Socrates belongs to the human species; the haecceity accounts for why he is this specific human being and not another.

This theory was deeply influential. The Stanford Encyclopedia of Philosophy notes that the concept of haecceity was revived in twentieth-century analytic philosophy by Robert Merrihew Adams and continues to play a role in debates about identity and individuation. The poet Gerard Manley Hopkins, who studied Scotus’s philosophy, used the idea of haecceity as the philosophical foundation for his poetic concept of “inscape” – the unique inner form of each thing.

God’s infinity: the defining attribute 🔗

Scotus developed one of the most intricate proofs for God’s existence in the entire history of philosophy. His argument, unfolded across multiple stages, establishes that there must be a being that is first in efficient causality, first in final causality, and supreme in perfection – what he called the triple primacy. He then showed that these three primacies converge in a single being, and that such a being must be endowed with intellect and will, and must be infinite.

For Scotus, infinity is the most important attribute of God – even more central than simplicity, which Aquinas had emphasised. God’s infinity means that every perfection God possesses – wisdom, goodness, power – is possessed to an unlimited degree. This infinite mode of being is what fundamentally distinguishes God from creatures, who possess the same perfections but only in a finite, limited way.

This connects directly to the univocity thesis. The difference between God and creatures is ultimately one of degree – infinite versus finite – rather than one of kind. This allows meaningful predication about God while preserving the vast distance between Creator and creation.

The primacy of will: Scotus’s voluntarism 🔗

One of the most distinctive and consequential aspects of Scotus’s philosophy is his emphasis on the primacy of the will over the intellect. This placed him squarely in the voluntarist camp, in contrast to the intellectualism of Aquinas and others in the Dominican tradition.

Aquinas had argued that the intellect holds a natural priority: the will can only desire what the intellect presents to it. Scotus did not deny that the intellect must present options to the will – in this sense, the intellect has a priority of origin. But he argued that the will commands the intellect, not the other way around. The will can choose to direct the intellect’s attention, accept or reject its conclusions, and act even against a correct intellectual judgment. As Encyclopedia.com puts it, Scotus saw human rationality as most perfectly expressed through love and voluntary activity, not merely through knowing.

Freedom as a defining mark of rational beings 🔗

For Scotus, the will is the only truly “rational power” in the precise sense of being a power for opposites: it can genuinely choose between alternatives. The intellect, by contrast, is a “natural” power – when presented with self-evident truths, it cannot help but assent to them. It is determined by its object. The will, however, has an inherent freedom that nothing can override.

Scotus further argued that the will has an innate inclination he called the affectio iustitiae (affection for justice), borrowing the term from Anselm of Canterbury. This inclination enables the will to love what is genuinely good in itself, not merely what benefits the agent. Without this affection, rational beings would be trapped in a cycle of self-interested desire, much like animals. The affection for justice frees the will from being enslaved to its own advantage.

This had major implications for both theology and ethics. In theology, Scotus applied voluntarism to God: God creates and establishes moral law not by necessity but by free choice. The moral commandments (except those directly concerning the love of God) are contingent on God’s free decision, not fixed by logical necessity. In ethics, it meant that human freedom – the ability to will otherwise – is the deepest expression of human dignity.

Augustinian and Aristotelian influences 🔗

Scotus’s thought cannot be neatly classified under a single tradition. He drew on both Augustine and Aristotle, but transformed what he borrowed. From the Augustinian-Franciscan tradition, he inherited the emphasis on divine will, the importance of love, and the view that faith involves more than intellectual assent. From Aristotle and his Islamic interpreters – especially Avicenna – he took the idea that metaphysics studies being as being, the framework of matter and form, and a commitment to rigorous logical argumentation.

But Scotus was no mere synthesiser. He broke with Augustine on the question of divine illumination (the idea that God directly enlightens the human mind for certain knowledge), arguing instead that human intellect can achieve certainty on its own through first principles, induction, and self-awareness. He broke with Aristotle by arguing that being is not an analogical concept distributed across the categories. And he broke with Aquinas on nearly every major philosophical question, from the nature of being to the individuation of substances to the structure of human freedom.

Scotus as a bridge to modern thought 🔗

The description of Scotus as a bridge between medieval and modern philosophy is not mere rhetoric. Several features of his system look strikingly anticipatory. His insistence that being is a univocal concept laid the groundwork for later thinkers who treated metaphysics as a general science of being rather than primarily a discipline about God. His voluntarism – the view that the will holds primacy over the intellect – anticipated the modern emphasis on freedom, choice, and personal agency that runs through thinkers from Descartes to existentialists like Sartre.

His concept of haecceity foreshadowed later philosophical concern with the irreducible individuality of persons and things – a concern that would become central in both analytic and continental philosophy. And his formal distinction, which gave philosophers a vocabulary for talking about non-identical aspects of a single thing, influenced discussions in metaphysics, philosophy of mind, and theology for centuries.

The twentieth-century French philosopher Gilles Deleuze drew directly on Scotus’s univocity of being to develop his own ontology of difference. Martin Heidegger’s early doctoral thesis also engaged with Scotus’s metaphysics (though partly through a misattributed text). These engagements underscore that Scotus’s ideas remain philosophically alive, not merely historically interesting.

Legacy and continuing relevance 🔗

Scotus was beatified by Pope John Paul II in 1993, and the intellectual tradition flowing from his work – known as Scotism – remained a powerful force in European universities well into the seventeenth century. His ideas shaped Francisco Suárez, influenced Descartes, and provided the Franciscan order with a distinctive theological and philosophical identity.

Today, scholars continue to debate the full implications of his metaphysics. Was the univocity of being a genuine revolution that led – for better or worse – to the modern separation of philosophy from theology? Or was it a carefully calibrated move that preserved the best of the older tradition while making metaphysics more rigorous? These questions remain open and actively discussed in both philosophical and theological circles.

What is not in dispute is that Scotus was one of the most brilliant minds of the entire scholastic period – a thinker whose ideas still challenge and reward anyone willing to grapple with them.

What do you think? Does Scotus’s argument that “being” means the same thing when applied to God and creatures strengthen or weaken our understanding of the divine? And is the will truly superior to the intellect in defining what it means to be human – or does genuine freedom require both working in equal partnership?

References

1. https://iep.utm.edu/john-duns-scotus/
2. https://www.encyclopedia.com/religion/encyclopedias-almanacs-transcripts-and-maps/duns-scotus-john-bl
3. https://plato.stanford.edu/entries/duns-scotus/
4. https://en.wikipedia.org/wiki/Univocity_of_being
5. https://en.wikipedia.org/wiki/Haecceity
6. https://plato.stanford.edu/entries/medieval-haecceity/
7. https://www.rep.routledge.com/articles/biographical/duns-scotus-john-c-1266-1308/v-1/sections/primary-object-of-the-intellect
8. https://muse.jhu.edu/article/454625/summary