The Ancients

Marcus Aurelius: The Philosopher Emperor

October 19, 2025

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  • Marcus Aurelius's enduring popularity today is primarily driven by his philosophical journal, which Professor William Stephens prefers to call the "memoranda" rather than the commonly known "Meditations." 
  • Marcus Aurelius was groomed for the throne and, upon succession, uniquely insisted on co-emperor Lucius Verus, despite Verus's lack of philosophical seriousness and preference for leisure over governance. 
  • The Antonine Plague, brought back by troops from the Parthian War, forced Marcus Aurelius to manage both traditional religious appeasement (orthopraxy) and practical crises, while his philosophical commitment to focusing only on what is within one's control (a lesson learned from Epictetus) guided his leadership. 
  • Marcus Aurelius's *Meditations* (or *memoranda*) is arguably the most popular book from the classical world down to the present day, surpassing even works like Julius Caesar's *Gallic Wars*. 
  • Marcus Aurelius is widely recognized as a 'philosopher-king,' though he was modest about his own philosophical abilities, and his work is now studied extensively by Stoic practitioners seeking mental order and focus on what is within their control. 
  • The popularity of Marcus Aurelius's philosophy is evidenced by figures like Bill Clinton reportedly benefiting from reading his *Meditations* and the general trend of men turning to Stoicism, often starting with the Philosopher Emperor. 

Segments

Marcus Aurelius Popularity and Sources
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(00:00:59)
  • Key Takeaway: Professor William Stephens prefers to call Marcus Aurelius’s philosophical journal the ‘memoranda’ instead of the misleadingly titled ‘Meditations’.
  • Summary: Marcus Aurelius’s modern popularity stems from his philosophical writings, which are better termed ‘memoranda.’ The primary non-autobiographical sources for his life include the Historia Augusta, coinage (numismatic evidence), portraiture, and archaeology along the Danube frontier. The memoranda itself is not a good source for tracking specific life events, offering only sparse details and virtues modeled by his mentors.
Grooming and Co-Emperorship
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(00:12:12)
  • Key Takeaway: Marcus Aurelius was groomed for the emperorship by Hadrian and Antoninus Pius, and upon succession, he insisted on Lucius Verus as his co-emperor, an unprecedented move.
  • Summary: Marcus was adopted by Antoninus Pius, who also adopted Lucius Verus, making them adoptive brothers. Antoninus Pius’s reign was peaceful, meaning he provided Marcus with no military training experience, leaving Marcus unprepared for the conflicts that immediately followed his ascension in 161 AD. Lucius Verus was not philosophical and preferred entertainment, delegating military matters during the Parthian War.
Parthian War and Plague Eruption
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(00:23:05)
  • Key Takeaway: The Parthian War, led by Lucius Verus in the East, was a watershed event that introduced the devastating plague back into the empire via returning soldiers.
  • Summary: Marcus Aurelius managed the empire from Rome while Lucius Verus campaigned in the East, relying on slow communication. The returning troops spread the plague, which Romans interpreted as a disturbance of the ‘Pax Deorum’ (peace with the gods). Marcus responded by rigorously enforcing traditional pagan rituals to appease the gods, even though his personal Stoic theology held that the gods only cause good.
Christian Persecution Context
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(00:36:33)
  • Key Takeaway: Christians were scapegoated during the plague because their monotheistic refusal to participate in state sacrifices was seen as disrupting the necessary social harmony with the gods.
  • Summary: Christianity was viewed as a destabilizing superstition by orthodox Roman pagans who believed the plague resulted from divine displeasure. Christians were executed if they refused to renounce their faith and sacrifice to the pagan gods, though Marcus Aurelius himself is not believed to have directly overseen or initiated these persecutions.
Lucius Verus’s Death and Northern Wars
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(00:40:25)
  • Key Takeaway: Lucius Verus died, likely from the plague, after taking credit for the Parthian victory, leaving Marcus Aurelius, who had gained military experience, to face the northern barbarian invasions alone.
  • Summary: Lucius Verus offered little administrative help during the plague crisis, leaving Marcus to handle the day-to-day governance. Marcus, though not a natural soldier, learned military management and relied on promoting experienced generals during the subsequent Northern Wars near the Danube. He reflected on the horrors of war, using the image of severed limbs to illustrate the Stoic concept of parts fulfilling their function within the whole.
Faustina and Imperial Finances
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(00:48:15)
  • Key Takeaway: Despite Marcus Aurelius’s devotion to his wife Faustina, the empire’s severe financial strain from war and plague forced them to auction off their personal palace possessions.
  • Summary: Rumors circulated that Faustina had affairs while Marcus was campaigning, potentially involving gladiators, leading to speculation about Commodus’s parentage. The empire faced a labor shortage, impacting mining and wealth generation, compelling Marcus to sell off personal assets to cover expenses. This act aligns with his Stoic practice of de-glamorizing material wealth, viewing expensive items like purple robes simply as dyed wool or corpses on a plate.
Final Years and Succession
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(00:55:11)
  • Key Takeaway: Marcus Aurelius constantly rehearsed the Stoic lesson of focusing only on what is within one’s control, while his final years involved legislating mercy and grooming his flawed son, Commodus, for succession.
  • Summary: Marcus legislated protections for widows and orphans and showed mercy to defeated foes, such as those in the Avidius Cassius revolt, reflecting his cosmopolitan philosophy. He frequently reflected on mortality, describing the body negatively, knowing his time was short. He elevated Commodus as co-emperor, urging his advisors to guide the young man away from his taste for gladiatorial entertainment, though Marcus ultimately could not control his son’s future actions.
Modern Relevance of Meditations
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(01:10:24)
  • Key Takeaway: Marcus Aurelius’s Meditations is often the primary association for men engaging with Stoicism today.
  • Summary: Bill Clinton is reputed to have benefited from reading the Meditations. For many men engaging with Stoicism, Marcus Aurelius and his musings are the first association, superseding other Roman elements like Rhodes or Aqueducts. The popularity of his work is noted in the context of a recent trend regarding thoughts of the Roman Empire.
Popularity of Marcus Aurelius
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(01:10:46)
  • Key Takeaway: The Meditations is claimed to be the most popular book from the classical world to the present day.
  • Summary: The Meditations (referred to as memoranda by the speaker) is suggested to have topped Julius Caesar’s Gallic Wars and Civil Wars in popularity from ancient history to today. This enduring popularity is evidenced by the countless editions and translations produced across centuries. The work’s appeal stems from Marcus Aurelius being a philosopher-king.
Philosopher-King and Stoic Practice
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(01:11:20)
  • Key Takeaway: Marcus Aurelius was modest about his philosophy, yet his work is routinely taught in classrooms and used by Stoic practitioners.
  • Summary: Marcus Aurelius was modest about his philosophical abilities, unlike Plato’s ideal philosopher-king. The number of professors teaching Marcus is dwarfed by the number of Stoic practitioners who use his work to order their minds. These practitioners turn to him to reflect on mortality and focus energy only on what is within their control.
Episode Conclusion and Book Plug
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(01:11:51)
  • Key Takeaway: Professor William Stephens’s book on Marcus Aurelius is titled Marcus Aurelius, Philosopher King.
  • Summary: The conversation concludes with thanks to Professor William Stephens for discussing the life and philosophy of Marcus Aurelius. Stephens’s book about the emperor is titled Marcus Aurelius, Philosopher King. The host encourages listeners to follow The Ancients podcast for future episodes.