106-43 BCE
Philosophy is the cultivation of the soul — eclectically take what is best from each school and apply it to living well and governing justly.
Marcus Tullius Cicero was born in 106 BCE in Arpinum, a hill town southeast of Rome that had produced another “new man” — the general Marius. His family was respectable but not noble; if Cicero wanted glory, he would have to earn it. He did.
His education was extraordinary: rhetoric, law, philosophy in Rome; then study in Greece and Rhodes, absorbing Plato at the Academy, Stoicism from Posidonius, oratory from Apollonius Molon. He returned to Rome and became its greatest advocate. His speeches against Verres made him famous; his prosecution of Catiline’s conspiracy in 63 BCE made him consul and “father of the fatherland.” He had saved the Republic — and never stopped reminding everyone.
But the Republic was dying. Pompey, Caesar, and Crassus formed the First Triumvirate; Cicero, who refused to join, was exiled through the machinations of Clodius (58-57 BCE). He spent his exile in misery, contemplating suicide. When recalled, he found himself sidelined. The great orator who had commanded the Senate now wrote philosophy while others commanded armies.
His philosophical works cluster in two periods of political impotence: 55-51 BCE (On the Orator, On the Republic, On the Laws) and 46-44 BCE (the great ethical and theological treatises). When he couldn’t act, he wrote. Philosophy was consolation but also preparation — training for the statesman he hoped to be again.
Caesar’s dictatorship crushed his political hopes. Then, in 44 BCE, Caesar was assassinated. Cicero, though not among the conspirators, rejoiced and threw himself back into politics. He delivered fourteen Philippics against Mark Antony, recalling his glory days against Catiline. It was magnificent oratory and political suicide.
When Octavian, Antony, and Lepidus formed the Second Triumvirate, they drew up proscription lists — enemies to be killed, property to be seized. Antony insisted on Cicero’s name. Octavian, whom Cicero had praised and advised, agreed. In December 43 BCE, soldiers caught Cicero fleeing to the coast. He ordered his slaves to set down his litter, faced his killers, and offered his neck. They cut off his head and hands; Antony’s wife Fulvia reportedly stabbed his tongue with a hairpin — revenge for his speeches.
His philosophical works survived, shaping Latin prose style, transmitting Greek thought to Rome and through Rome to the medieval and modern world. The orator who wanted political glory achieved something more lasting: he made philosophy speak Latin.
"To study philosophy is nothing other than to prepare oneself to die."
— Tusculan Disputations — echoing <a href="https://askthepolymath.com/philosopher/plato/" class="philosopher-link" data-philosopher-id="4840">Plato</a> Phaedo, philosophy as preparation for death
"The good of the people is the highest law."
— De Legibus (On the Laws) — the foundation of republican political philosophy
"A room without books is like a body without a soul."
— Attributed — captures his view of philosophy and culture as essential to human flourishing
Cicero was an Academic skeptic — not skeptical about everything, but committed to the Academic method of arguing all sides to reach probable truth. He believed certainty was unavailable in philosophy, but probability was enough for living. “I am not one of those whose mind wanders in error and never sees what is probable.”
His philosophical project was translation — in both senses. He translated Greek philosophical vocabulary into Latin, creating terms that shaped all subsequent Western thought: humanitas, qualitas, moralis, beatitudo, essentia, and many more. When we speak of “moral quality” or “essence” or “humanity,” we speak Cicero’s Latin. He also translated Greek philosophy into Roman practice: not contemplation for its own sake but wisdom for the statesman.
Ethics was central. De Finibus examines three theories of the supreme good: the Epicurean (pleasure), the Stoic (virtue), and the Peripatetic (virtue plus external goods). Cicero finds the Stoic view most defensible but leans toward the Peripatetic: virtue is necessary for happiness, but health, friends, and modest wealth help. His practical Roman temperament resisted Stoic extremism.
De Officiis applies ethical theory to practice. What is honorable (honestum)? The four cardinal virtues: wisdom, justice, courage, temperance. What is useful (utile)? What benefits us — wealth, power, reputation. What happens when they conflict? The honorable always wins. Apparent conflicts arise only from confusion: true utility never conflicts with true honor. This framework dominated Western ethics through the Renaissance.
Political philosophy in De Re Publica defends the mixed constitution — combining monarchy, aristocracy, and democracy — as most stable. The dialogue, set in Scipio’s circle, discusses Roman history as political philosophy. The surviving Dream of Scipio offers cosmic perspective: souls are immortal; the universe is vast; political glory fades; only virtue endures.
Natural law emerges in De Legibus: there is a law above human laws, accessible to reason, binding on all people, unchanging across time and place. This Stoic idea, transmitted through Cicero, shaped Roman jurisprudence, Christian political theology, and modern human rights discourse.
Theology in De Natura Deorum presents three positions: Epicurean gods who exist but don’t care, Stoic providence governing all, Academic suspension of judgment. Cicero leans toward Stoic theism but won’t commit. The dialogue models philosophical inquiry as conversation, not dogma.
Throughout, the style matters. Cicero believed philosophy should be eloquent — truth persuasively presented. His dialogues made philosophy urbane, accessible, cultured. He created the tradition of humane letters where philosophy, rhetoric, and literature intertwine.