The Virtue Each Species Was Built to Carry — Species Propensities and the Classical Tradition
Part of the Anthropomorphic Writing Series
An earlier post in this series introduced the concept of the species propensity — the defining characteristic each species carries, which goes right when properly ordered and goes wrong when it doesn't. Another post mapped those propensities onto the history of the world, showing how each species shows up at the moments their particular nature equips them for.
This post goes one level deeper.
The four classical cardinal virtues — prudence, justice, fortitude, and temperance — were identified by Plato, systematized by Aristotle, and given their fullest theological development by Thomas Aquinas. They are called cardinal virtues because everything else in the moral life hinges on them, the way a door hinges on its cardinal pin. Aquinas argued that these four virtues are not independent traits but a unified structure: you cannot have any one of them fully without the others, because each requires the others to govern it.
What I want to argue here is that each of the four main species carries one of these virtues as its natural inheritance — the virtue that their propensity, when properly ordered, most fully expresses. And that each species' disorder is the failure of that virtue specifically, which is why different species go wrong in recognizably different ways.
A quick note for anyone new to this series: the four species discussed here are the Vulpens (foxes), the Leonites (lions), the Ursinians (bears), and the Lupenites (wolves). Each species is introduced in its own deep dive on this blog — but this post is designed to be readable on its own.
The Vulpen (Fox) and Prudence
Prudence is the most foundational of the four cardinal virtues — Aquinas calls it the auriga virtutum, the charioteer of the virtues, because it governs all the others. Prudence is not cleverness. It is not the ability to see opportunity and exploit it. It is right reason applied to action: the capacity to see what is truly good in a concrete situation and to act accordingly.
The Vulpen propensity is the clearest embodiment of prudence in its proper form. The Vulpen sees what others miss. He reads a situation before anyone else has finished processing it. He understands human — and species — nature with an accuracy that can be unsettling. These are not morally neutral traits that could go either way. They are, in their origin, the shape of a soul designed for practical wisdom: the ability to see clearly and act rightly on what is seen.
The disorder is the same capacity turned inward. Prudence stripped of justice, fortitude, and temperance — the Vulpen who sees clearly but serves only himself — becomes manipulation. The charioteer without a destination is just someone driving very fast. The intelligence remains. The accuracy of perception remains. What is lost is the ordering of that intelligence toward what is genuinely good.
This is why the Vulpen is the species most naturally suited to the role of advisor, of counselor, of the one who moves in the margins making things work that the official systems cannot reach. The historical Robin Hood was a Vulpen because the virtue of prudence, when it operates in service of justice rather than self, does exactly what Robin Hood did: it sees what the powerful have missed, understands the gap between the law as written and the law as lived, and acts on it.
The Vulpen who has fully ordered his prudence serves others with his sight. The Vulpen who has fully disordered it serves only himself — and does so with perfect efficiency, because the sight is still there. For more on who the Vulpens are and how to write them, see the Vulpen deep dive.
The Leonite (Lion) and Justice
Justice, in the classical tradition, is not primarily about courts and punishments. It is giving each their due — the ordering of relationships and society toward what is right, the disposition to render to every person and every claim what properly belongs to them.
The Leonite propensity is authority: the natural gravity that makes others orient around him, the capacity to stand at the front of something enormous and carry it. In its proper form, this is exactly what justice requires. The virtue of justice needs someone to embody and enforce it — someone with the weight to make the ordering of society real rather than theoretical. The Leonite king who carries his people, who absorbs the cost of authority so that those under him don't have to, who orients his gravity outward rather than inward — this is authority in the service of justice, which is exactly what authority was designed for.
David is called a man after God's own heart not because he is sinless but because his authority, at its best, is always aimed at something beyond himself. Solomon's wisdom is ordered toward just judgment. Charlemagne's empire is ordered toward a civilization that can sustain the good life for its people. The Leonite propensity and the virtue of justice are designed for each other.
The disorder is authority without justice — dominance that serves the self rather than what is due to others. The tyrant is not a different kind of creature from the king. He is the same propensity in its disordered form: authority that has substituted itself for the good it was meant to serve. He still has gravity. People still orient around him. But the direction that gravity points has inverted, and everything that should be given outward is now taken inward instead.
This is also why the virtue of justice is the hardest for a Leonite to sustain in its fullest form. The propensity toward authority is strong enough that it can accomplish a great deal while only partially ordered toward justice — and that partial success can disguise the disorder for a long time. See the Leonite deep dive series for the full portrait, including the Leonite's specific species flaw.
The Ursinian (Bear) and Fortitude
Fortitude is the virtue of endurance and courage — not the absence of fear, but the ability to hold one's position in the face of it. Aquinas distinguishes between two acts of fortitude: aggression, the willingness to attack what threatens the good, and endurance, the willingness to sustain the assault without breaking. He argues that endurance is the greater act, because it requires holding on when there is nothing to do but hold.
The Ursinian is built for this. The propensity toward immovability, toward the deep capacity to absorb cost without breaking, toward outlasting what would destroy anyone else — this is fortitude in physical and temperamental form. Churchill in 1940 is the Ursinian vocation expressed at civilizational scale: not commanding his way through the crisis but outlasting it, refusing to be moved when every rational calculation suggested that being moved was the only option.
The Ursinian's fortitude is not the dramatic courage of the charge — that belongs more naturally to the Leonite, whose authority includes the willingness to stand at the absolute front of something. The Ursinian's courage is quieter and, in some ways, harder: it is the courage of the long haul, of the sustained refusal to quit, of being the thing that does not break when everything else is breaking.
The disorder is fortitude without prudence and temperance — endurance that does not know when to stop, force that cannot modulate itself, the mountain that everything breaks against regardless of whether everything breaking is the right outcome. The Ursinian who has lost the governing virtues does not become weak. He becomes immovable in the service of the wrong things, and his immovability becomes a form of destruction more thorough than any ordinary aggressor's because it simply does not yield. For a full portrait of who the Ursinians are, see the Ursinian deep dive.
The Lupenite (Wolf) and Temperance
Of the four classical virtues, temperance is perhaps the most misunderstood. It is not mere moderation — not a counsel to have less of everything. It is the right ordering of desire: the alignment of what a person wants with what is genuinely good, so that appetite and reason are not in conflict but moving together toward the same end.
The Lupenite propensity is love — fierce, non-negotiable, the bond that cannot be broken. In a family sense, in a friendship sense, in the sense of the loyalty that would endure anything rather than abandon the people it belongs to. This propensity, in its proper form, is love rightly ordered: the love that Paul describes in 1 Corinthians 13, which bears all things and endures all things and never fails.
This is temperance in its fullest expression, because temperance is what it looks like when what you want and what is truly good are perfectly aligned. The Lupenite who loves rightly — who loves his family fully and genuinely but does not love them at the expense of justice, who extends that love outward as Ilariy Volorsky does when his deepest loyalty has found its proper object — is a soul in whom desire has been so well ordered that there is no gap between what he wants and what he ought to want. For the full picture of what that looks like, see The New Creation.
The disorder is love without proper ordering — desire that has not been governed by reason and justice, that has become possessive and exclusive, that says my people with a ferocity that has no outside. This is not coldness. This is love that has refused to be governed, that has made the object of its love into an absolute. The Lupenite whose loyalty is fully disordered loves as intensely as the sanctified Lupenite. That is precisely what makes the disorder dangerous: there is nothing wrong with the intensity of the love. What is wrong is where it stops. This dynamic is explored in depth in The Cost of the Coat and the Great Inversion.
Why This Matters: The Unity of Virtue
Aquinas argues that the four cardinal virtues are unified — that having one in its fullest form requires having all of them, because each virtue requires the others to govern and support it. Prudence without justice is clever amorality. Justice without fortitude collapses under pressure. Fortitude without temperance is endurance in the service of appetite. Temperance without prudence is mere impulse control without wisdom.
This means that each species' disorder is also a failure of the other virtues, not just the one they were designed to carry.
The disordered Vulpen lacks not only properly ordered prudence but justice — his intelligence has no commitment to giving others their due. The disordered Leonite lacks not only properly ordered justice but temperance — his authority has not moderated its own demands. The disordered Ursinian lacks not only properly ordered fortitude but prudence — his endurance has lost the capacity to determine what is worth enduring for. The disordered Lupenite lacks not only properly ordered temperance but justice — his love has stopped caring what others outside the circle are due.
For writers, this is the deeper principle: a character's virtue and their flaw are not different things. They are the same thing — the same propensity, the same characteristic strength — in its ordered and disordered forms. The character who embodies a virtue fully is also the character who, if disordered, embodies that virtue's specific failure. You cannot have the saint without the possibility of the sinner of the same type, and vice versa.
This is also what makes anthropomorphic characters, written well, so much richer than the alternative. A human character can have any virtue or any flaw. An anthropomorphic character carries a specific one — written into their nature — and everything they do is shaped by how ordered or disordered that particular virtue is in them. The story tells itself, if you understand what you're working with.
For the framework underlying all of this, see the Species Flaws and Redirection post, which lays out the three responses to the species flaw — and for what happens when the disorder goes all the way, see the companion piece to this article on writing the fully disordered character.
— Eric Flegal
Want to go deeper? Explore the full Anthropomorphic Writing Series — from the theological foundation to the species deep dives to the craft of putting real moral architecture on the page.
Part of the Anthropomorphic Writing Series
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