Marcus Aurelius: The Philosopher-Emperor Who Wrote Letters to His Sons
The most powerful man in the world wrote private notes on how to be a good person—then watched his son become everything he'd feared.
Rome, 180 AD. The Danube frontier.
Marcus Aurelius, Emperor of Rome, sat in his military tent writing by lamplight. Outside, his legions settled in for another cold night on the northern border, fighting Germanic tribes that had been pushing into Roman territory for years. He was exhausted. Sixty years old, sick with what was likely plague, and so tired that even sitting upright felt like a battle.
But he picked up his stylus anyway.
Not to write military orders. Not to draft policy. Marcus was writing to himself—or maybe to his sons—about what it meant to be a good person.
“Don’t waste the rest of your time here worrying about other people… See what things are in themselves, dividing them into matter, form, and purpose… Remember how long you’ve been putting this off, how many extensions the gods gave you, and you didn’t use them.”
These weren’t imperial decrees. They were reminders. Notes on how to stay decent when you have absolute power. Lessons on how to be a good father, a good man, in a world designed to make you neither.
Marcus Aurelius left behind one of history’s most enduring works of philosophy—his Meditations. What he couldn’t leave behind was a son who would actually live by it.
This is the story of a father who tried to teach virtue to a boy who would become a monster.
The Boy Who Was Born to Rule
Marcus Aurelius didn’t ask to be emperor. He was born Marcus Annius Verus in 121 AD, the son of a prominent Roman family. His father died when Marcus was three, and he was raised by his grandfather—another Marcus—a man of discipline, integrity, and old Roman virtue.
As a child, Marcus was serious, almost painfully so. While other Roman boys trained in athletics and charm, Marcus studied philosophy. He slept on the floor instead of a bed. He practiced self-denial like a monk in training. At twelve, he adopted the rough cloak of a Stoic philosopher, rejecting luxury.
His tutors worried he was taking it too far.
But Emperor Hadrian saw something else: a boy who might be worthy of the throne. In 138 AD, Hadrian arranged for his successor Antoninus Pius to adopt Marcus as his son and heir. At seventeen, Marcus became the future emperor of Rome.
And from that moment, his entire life became preparation.
Antoninus Pius taught Marcus how to govern. How to listen to advisors. How to stay calm under pressure. How to balance mercy with justice. For twenty-three years, Marcus apprenticed under one of Rome’s best emperors, absorbing lessons in leadership and restraint.
When Antoninus died in 161 AD, Marcus Aurelius became emperor at age forty. His first act? Sharing power with his adoptive brother Lucius Verus, even though Marcus had all the authority to rule alone.
This wasn’t weakness. It was philosophy in action. Marcus believed in duty over ambition, service over ego. He didn’t want to be emperor. But if he had to be, he’d do it right.
Raising an Heir in a Palace
Marcus married Faustina the Younger when he was twenty-four. By all accounts, theirs was a genuine partnership—unusual for Roman political marriages. Over the next twenty-three years, Faustina gave birth to at least thirteen children.
Twelve of them died.
Infant mortality was brutal in ancient Rome, even for emperors. Marcus and Faustina buried child after child. The grief must have been crushing. But Marcus kept writing in his journal about acceptance, about the natural order of things, about not raging against what you cannot control.
Five children survived to adulthood. One of them was Commodus, born in 161 AD—the same year Marcus became emperor.
From the beginning, Commodus was different. Where Marcus had been contemplative and disciplined, Commodus was volatile and hungry for attention. Where Marcus studied philosophy, Commodus idolized gladiators. Where Marcus practiced restraint, Commodus craved spectacle.
But Commodus was the only surviving son. And in Rome, that meant he would be emperor.
Marcus knew this from the day Commodus was born. Every decision he made as a father was shadowed by this reality: he wasn’t just raising a son. He was raising the future ruler of the most powerful empire in the world.
So he gave Commodus the best education money could buy. He assigned tutors in philosophy, literature, rhetoric, and warfare. He brought Commodus along on military campaigns to toughen him up. He modeled restraint, discipline, and duty every single day.
And none of it worked.
The Meditations: A Father’s Desperate Hope
Marcus’s Meditations weren’t meant to be published. They were private journals, written in Greek during long military campaigns on the Danube frontier. No title, no structure—just notes to himself on how to stay grounded when the world tried to corrupt you.
But if you read them carefully, they’re also notes to his children.
“Remember that to change your mind and follow someone who sets you right is to be nonetheless the free agent that you were before.”
“When you wake up in the morning, tell yourself: The people I deal with today will be meddling, ungrateful, arrogant, dishonest, jealous, and surly.”
“The best revenge is not to be like your enemy.”
“Waste no more time arguing what a good man should be. Be one.”
These aren’t abstract philosophy. They’re survival instructions for someone about to inherit enormous power. They’re a father’s desperate attempt to teach his son how to stay human when you can have anyone killed with a word.
Marcus watched Commodus grow into a young man who preferred the arena to the library. Who collected gladiators the way other boys collected coins. Who showed flashes of cruelty that must have terrified his father.
What do you do when you’re writing lessons on virtue for a son who doesn’t seem interested?
You write them anyway. Because what else can you do?
In 177 AD, Marcus formally made Commodus co-emperor at age sixteen. It was a public acknowledgment of what everyone already knew: Commodus would be the next emperor. But it was also a last-ditch effort to mentor him through the actual work of governance.
For three years, father and son ruled together. Marcus took Commodus on military campaigns, exposed him to the realities of war, tried to instill the discipline of command.
But Commodus hated the frontier. He hated the cold, the fighting, the endless decisions. He wanted to be back in Rome, in the arena, playing gladiator.
The Death That Changed Everything
March 17, 180 AD. Marcus Aurelius died in his military camp near Vienna, likely from plague. He was sixty years old.
There are rumors—never proven—that Commodus’s doctors may have hastened Marcus’s death. Whether or not that’s true, one thing is certain: the moment Marcus died, Commodus stopped pretending to care about philosophy.
Commodus immediately abandoned the military campaign his father had been fighting for years. He made peace with the Germanic tribes—on terrible terms for Rome—and rushed back to the capital.
And then he became the emperor his father had nightmares about.
Commodus renamed Rome “Colonia Commodiana”—the Colony of Commodus. He renamed the months of the year after himself. He fought in the arena as a gladiator, degrading the office of emperor by treating it like a performance.
He killed senators who opposed him. He drained the treasury on games and spectacles. He declared himself the reincarnation of Hercules and commissioned statues of himself in a lion skin, holding a club.
The philosopher-emperor’s son became a megalomaniac.
Everything Marcus had feared, everything he’d tried to prevent through education and example and those desperate journal entries—it all came true.
In 192 AD, after twelve years of chaos, Commodus was strangled in his bath by his own wrestling partner, part of a conspiracy that included his closest advisors.
Rome breathed a sigh of relief. The Senate damned Commodus’s memory—damnatio memoriae—ordering his name erased from public monuments.
Marcus Aurelius had been one of Rome’s greatest emperors. His son was one of its worst.
What Went Wrong?
For two thousand years, people have asked: how did Marcus Aurelius raise that?
Some historians blame genetics—maybe Commodus inherited mental instability. Others blame the court environment—surrounded by sycophants from birth, Commodus never learned accountability. Some point to Faustina, suggesting she may have been unfaithful and that Commodus wasn’t actually Marcus’s biological son (though there’s little evidence for this beyond Roman gossip).
But the simplest explanation might be the hardest one: Marcus did everything right, and it still wasn’t enough.
He gave Commodus the best education. He modeled virtue every day. He brought him into governance early. He wrote down his wisdom in case his presence wasn’t enough.
And Commodus ignored all of it.
Because here’s the truth that every parent eventually faces: you can control what you teach, but you can’t control what they learn.
Marcus understood this. In his Meditations, he wrote: “Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.”
He knew his perspective—Stoic virtue, self-discipline, duty—was just one way of seeing the world. And he knew Commodus had his own perspective, one shaped by being born into unimaginable power and raised by an empire that would give him anything he wanted.
What’s remarkable isn’t that Commodus failed to live up to Marcus’s ideals. It’s that Marcus kept trying, kept writing, kept teaching—even when it must have been clear it wasn’t working.
The Legacy That Endured
Marcus Aurelius’s Meditations survived because someone—we don’t know who—preserved the journals after his death. They weren’t published widely until the Renaissance, but once they were, they became one of the most influential works in Western philosophy.
Generals have carried copies into battle. Presidents have quoted them in speeches. Entrepreneurs and athletes and therapists and dads have found solace in Marcus’s relentless focus on what you can control versus what you can’t.
“You have power over your mind—not outside events. Realize this, and you will find strength.”
“The impediment to action advances action. What stands in the way becomes the way.”
“When you arise in the morning, think of what a precious privilege it is to be alive—to breathe, to think, to enjoy, to love.”
These words have lasted two millennia. Commodus’s statues were torn down within weeks of his death.
In the end, Marcus’s legacy wasn’t his son. It was his ideas. The lessons he wrote for Commodus became lessons for the world.
The Takeaway for Modern Dads
Marcus Aurelius tried to raise a philosopher-king and got a tyrant instead. That failure doesn’t diminish what he taught. It amplifies it.
Here’s what that means for us:
You can’t control the outcome, only the effort. Marcus gave Commodus the best education, the best example, the best opportunities. And Commodus still chose spectacle over wisdom. Sometimes your best isn’t enough. That doesn’t mean you stop trying.
Model the behavior you want to see. Marcus didn’t just lecture about virtue—he lived it. He slept on a hard bed, practiced self-denial, treated advisors with respect, and governed with restraint. Kids notice what you do more than what you say.
Write it down. Marcus couldn’t be with his children all the time—he was at war for much of their childhood. So he wrote. Those journal entries became a manual for how to live. If you can’t always be there, leave something behind that will.
Your legacy isn’t your children—it’s what you teach them. Commodus failed to embody his father’s philosophy, but that philosophy didn’t die. It spread. It endured. Your kids might reject your lessons. The world might still benefit from them.
Privilege makes parenting harder, not easier. Commodus grew up with unlimited power and zero consequences. That didn’t make him strong—it made him weak. If your kids have it easy, find ways to introduce struggle, discipline, and accountability. Comfort is a terrible teacher.
Accept what you can’t change. This is the core of Stoicism: focus on what’s in your control. You can’t control your child’s choices. You can control your own response, your own example, your own effort. Letting go of the rest isn’t giving up—it’s sanity.
Keep teaching, even when it feels pointless. Marcus kept writing in those journals even as he watched Commodus spiral. He didn’t know those words would outlast Rome itself. You don’t know what will stick. Teach anyway.
Your relationship with your partner matters. By all accounts, Marcus and Faustina had a genuine partnership. She supported him through grief, war, and the pressures of empire. Commodus grew up watching that. Whatever else went wrong, he saw what a healthy partnership looked like.
Failure doesn’t erase effort. Marcus “failed” to raise a good emperor. But he succeeded at living a principled life under unimaginable pressure. That effort matters, even when the results disappoint.
Marcus Aurelius was the most powerful man in the world. He had wealth, authority, and access to every resource Rome could provide. And he still couldn’t guarantee his son would turn out right.
If that doesn’t make you feel better about your own parenting anxieties, nothing will.
The philosopher-emperor’s real lesson isn’t about success. It’s about persistence. You do the work. You model the values. You write down the truth as you understand it. Then you let go of the outcome, because it was never yours to control in the first place.
Marcus wrote: “Do not disturb yourself by thinking of the whole of your life. Let not your thoughts at once embrace all the various troubles which you may expect to befall you: but on every occasion ask yourself: what is there in this which is intolerable and past bearing?”
Translate that for modern fatherhood: Don’t panic about how your kids will turn out at forty. Just focus on today. What can you teach them right now? What can you model in this moment?
Do that, and you’ve done your job.
The rest—like Marcus learned the hard way—is beyond your control.
Sources
- Marcus Aurelius. Meditations (translated by Gregory Hays, Modern Library edition)
- Birley, Anthony. Marcus Aurelius: A Biography (Routledge, 1987)
- Grant, Michael. The Antonines: The Roman Empire in Transition (Routledge, 1994)
- McLynn, Frank. Marcus Aurelius: A Life (Da Capo Press, 2009)
- Historia Augusta: Life of Marcus Aurelius and Life of Commodus (ancient biographical source, reliability contested but widely referenced)
- Cassius Dio. Roman History, Books 71-73 (covering the reign of Marcus Aurelius and Commodus)
- Herodian. History of the Roman Empire (contemporary account of Commodus’s reign)
- “Marcus Aurelius and the Difficulty of Succession” - Cambridge Ancient History, Vol. XI
- Rutledge, Steven H. “Commodus, Autocracy, and the Antonine Legacy” in A Companion to Marcus Aurelius (Wiley-Blackwell, 2015)
- Letters of Marcus Aurelius to Fronto (preserved correspondence showing personal side of Marcus)