Marcus Aurelius was Roman emperor from 161 to 180 AD and the last of the Five Good Emperors — a succession of rulers whose reigns represented, in Edward Gibbon's assessment, the period in which the condition of the human race was most happy and prosperous. He was also a Stoic philosopher who practiced his philosophy seriously, under conditions of unusual difficulty, for most of his adult life.
The combination is historically singular. Philosophy and political power have occasionally intersected, but rarely in a person who held both with genuine seriousness. Marcus was not a philosopher who dabbled in politics or a politician who used philosophy as decoration. He was both, fully, for two decades — governing an empire through plague, military crisis, and political complexity while maintaining a private philosophical practice whose record, the Meditations, is among the most significant documents in the history of Stoicism.
He did not intend it to be read. The Meditations were private notes, written in Greek during military campaigns on the northern frontier of the empire. They were not a philosophical treatise. They were a practice journal — the record of a man arguing with himself, reminding himself of what he knew, and measuring himself against a standard he was fully aware he did not always meet. That they survived, and that they remain in continuous readership nearly two thousand years after they were written, is one of the more remarkable facts in the history of ideas.
Life
Marcus Aurelius Antoninus was born on April 26, 121 AD in Rome. His birth name was Marcus Annius Verus. His father died when he was three years old and he was raised primarily by his paternal grandfather, also named Marcus Annius Verus, who was a prominent figure in Roman public life and a personal friend of the emperor Hadrian.
Hadrian noticed Marcus early. He nicknamed the boy Verissimus — most truthful — and took an interest in his education and advancement. When Hadrian was arranging the succession, he required his chosen heir Antoninus to adopt both Marcus and Lucius Verus as sons, effectively placing Marcus in the line of succession at the age of seventeen.
Marcus's philosophical education began in earnest around this time. He studied rhetoric under Marcus Cornelius Fronto, whose letters to Marcus survive and provide a picture of the young man's intellectual formation. But the decisive influence on his philosophical development was Quintus Junius Rusticus, a Stoic philosopher who introduced Marcus to the works of Epictetus. In the first book of the Meditations, where Marcus records his debts to the people who shaped him, he credits Rusticus with giving him a copy of Epictetus's lecture notes — what we now know as the Discourses — and with modeling philosophical seriousness in daily life.
Marcus became emperor in 161 AD at the age of thirty-nine, on the death of Antoninus Pius. Almost immediately the empire was at war. A Parthian invasion in the east required a military response that occupied several years. Before that campaign was fully resolved, a plague — now believed to have been smallpox — arrived with the returning armies and spread across the empire. The Antonine Plague, as it is known, killed an estimated five million people over fifteen years. Marcus governed through all of it.
In 168 AD he moved north to address a serious threat from Germanic tribes along the Danube frontier. He spent most of the next twelve years on campaign, governing the empire from military quarters. The Meditations were written during this period. He died at the frontier on March 17, 180 AD, at the age of fifty-eight. The cause of death was most likely the plague.
Philosophy
Marcus's philosophy is Stoicism as practice rather than theory. The Meditations contain almost no original philosophical argument. What they contain is the sustained application of Stoic ideas — drawn primarily from Epictetus, whom Marcus quotes extensively — to the specific conditions of Marcus's life.
This is not a limitation. It is precisely what makes the Meditations valuable. Most philosophical texts argue for positions. The Meditations record someone trying to live one. The gap between knowing the right thing and doing it, between philosophical conviction and immediate emotional response, between the standard and the performance — all of this is present in the text in a way it rarely is in more formally constructed philosophical writing.
Several themes recur with enough consistency to constitute the practical core of Marcus's Stoicism.
The dichotomy of control. Marcus returns to the distinction between what is within his power and what is not throughout the Meditations. He was governing an empire over which he had enormous formal authority and limited actual control. Plague, war, the behavior of subordinates, the loyalty of the legions, the condition of the provinces — all of these were his responsibility and none of them were fully his to determine. The Stoic framework gave him a way to engage fully with all of it without staking his psychological stability on any of it.
The present moment. One of the most consistent preoccupations in the Meditations is with attention to the present. Marcus repeatedly reminds himself that the past is fixed and the future is not yet his, and that the only place virtue can be practiced is in the present moment. This is not a counsel of short-term thinking. It is an argument about where effort and attention actually belong.
"Confine yourself to the present."
— Marcus Aurelius, Meditations, Book 8, trans. Gregory Hays
The view from above. Marcus describes a meditative practice of imagining human life from a great height — looking down at the cities, the conflicts, the ambitions, the grief — and recognizing the scale of any individual life within the totality. The exercise is designed to produce proportion, not meaninglessness. From sufficient distance, the things that feel urgent reveal their actual scale.
Impermanence. The Meditations return persistently to the fact that everything passes. Emperors, philosophers, empires, achievements — all of it is temporary. Marcus does not treat this as a reason for despair. He treats it as a reason for clarity about what actually matters and for full engagement with what is present while it is present.
The social nature of human beings. Marcus was unusual among Stoic writers in the consistency with which he emphasized the obligations that come with being a social creature. Human beings are, in his view, made for cooperation. Acting against other people is acting against your own nature. He returns to this point repeatedly, often in the context of reminding himself not to be irritated by the people he governs.
"We are made for cooperation, like feet, like hands, like eyelids, like the rows of the upper and lower teeth."
— Marcus Aurelius, Meditations, Book 2, trans. Gregory Hays
The Meditations
The Meditations survive in a single medieval manuscript. They were not published in antiquity and may not have been known outside Marcus's immediate circle during his lifetime. The title is not Marcus's own — the work has been called various things over the centuries, and the Greek original is sometimes referred to simply as Ta eis heauton, meaning roughly "to himself."
The text is organized into twelve books, though the organization does not appear to be thematic or chronological in any systematic way. Book 1 is distinct from the rest — it is a list of acknowledgments, recording Marcus's debts to the people who shaped his character. Books 2 through 12 are the practice journal: observations, reminders, arguments, and self-corrections written for no audience but himself.
The best modern translation is widely considered to be Gregory Hays's version, published by the Modern Library in 2002. Hays renders Marcus's Greek into contemporary English without losing the philosophical precision of the original. Robin Hard's Oxford University Press translation is also excellent and includes extensive scholarly apparatus. Both are recommended depending on whether you want a reading experience or a study text.
For those who want access to the original Greek alongside an English translation, the Perseus Digital Library at Tufts University maintains a freely accessible version with the Farquharson translation.
Legacy
Marcus Aurelius died without securing a stable succession. He had broken with the tradition of the Five Good Emperors by designating his biological son Commodus as his successor rather than adopting a capable administrator. Commodus's reign was disastrous — erratic, cruel, and eventually ended by assassination — and Rome's decline from the stability of the Antonine period was rapid.
The contrast between Marcus and his son has fascinated historians for centuries. It is also, in a particular way, a Stoic problem. Marcus understood virtue as the product of sustained practice and philosophical commitment. He also understood that a father's influence on a son is one of the clearest examples of something you can affect but not determine. Whether that was enough is a question the historical record does not resolve.
His philosophical legacy is considerably more secure than his dynastic one. The Meditations have been in continuous readership since their first publication in the sixteenth century. They have been read by figures as different as Frederick the Great, John Stuart Mill, Matthew Arnold, and Theodore Roosevelt. In the twentieth and twenty-first centuries, their influence has extended into cognitive behavioral therapy, leadership literature, and the broader cultural revival of Stoic practice.
The text endures because it is honest. Marcus was the most powerful man in the world, and his private notes record daily failure, daily recommitment, and a sustained effort to be better than his first impulses allowed. That combination — high standards, honest accounting, and the absence of any performance for an audience — is rare in any literature and rarer still in the literature of power.
Key Texts
- Meditations. Trans. Gregory Hays. Modern Library, 2002. The most readable modern translation.
- Meditations. Trans. Robin Hard. Oxford University Press, 2011. Scholarly edition with commentary.
- The Meditations of Marcus Aurelius. Trans. A.S.L. Farquharson. Available via Perseus Digital Library.
Further Reading
- Hadot, Pierre. The Inner Citadel: The Meditations of Marcus Aurelius. Trans. Michael Chase. Harvard University Press, 1998. The definitive scholarly study of the Meditations.
- McLynn, Frank. Marcus Aurelius: A Life. Da Capo Press, 2009. The most comprehensive modern biography.
- Robertson, Donald. How to Think Like a Roman Emperor. St. Martin's Press, 2019. A psychotherapist's account of Marcus's Stoic practice and its modern applications.
- Birley, Anthony. Marcus Aurelius: A Biography. Revised edition. Routledge, 1987. The standard scholarly biography.