Hellenistic philosophy — comprising Stoicism, Epicureanism, and Skepticism — emerged after Aristotle’s death across the Mediterranean world and is united by a single practical question: how do we live a good life (eudaimonia)? Unlike modern philosophy’s abstract speculation, these schools treated ethics as “first philosophy,” meaning logic, physics, and metaphysics were studied not for their own sake but because understanding reality was constitutive of flourishing. The interview with AA Long, a pioneering scholar of the field, explores how each school defined happiness, how their prescriptions often invert modern assumptions, and why they remain deeply relevant today.
What Makes Hellenistic Philosophy Distinct
Eudaimonia as the central goal: All three schools sought a “successful life” — not merely moral goodness but a life one could look back on as well-lived and flourishing. Socrates was the key figure who first put this question on the map as something rationally examinable.
Ethics as first philosophy: Unlike Aristotle, who compartmentalized his scientific and ethical works, the Hellenistic schools made physics, logic, and cosmology inseparable from the project of living well. Studying nature wasn’t optional — it was part of what made a life good.
Cosmopolitan and inward turn: After Alexander the Great’s conquests, Greek culture spread across a vast world. The city-state (polis) receded as the foundation of ethics. Stoics, Epicureans, and Skeptics all turned inward, arguing that a person’s inner rationality — not political community — was the firm basis for a tranquil life.
Not born of despair: A common misconception is that these philosophies were “back to the wall” responses to political collapse. Long argues the Hellenistic world was actually quite prosperous. These philosophies were additive — offering paths to fulfillment, not just consolation.
Fragmentary sources: Most original texts from early Stoicism and Epicureanism have perished. What survives are quotations, summaries, and later Roman works (like Epictetus, Seneca, Marcus Aurelius, and Lucretius), making reconstruction a central scholarly challenge.
Stoicism
Founders and phases: Founded by Zeno of Citium (a Cypriot who migrated to Athens), developed by Cleanthes and Chrysippus (the greatest ancient logician after Aristotle, whose work anticipated modern propositional calculus). Three phases: early (creative, theoretical), middle (diffusion into Rome), and later (practical, therapeutic — the Stoicism most people know today).
Socratic and Cynic roots: Zeno studied with the Cynic Crates. The Cynics rejected conventional goods (wealth, status, ambition) as unnatural, stripping life back to what is basic — Diogenes telling Alexander to stop blocking his sun is the emblematic story. Stoicism inherited this emphasis on inner resources but diverged by accepting “preferred indifferents.”
Virtue and preferred indifferents: Virtue (reason, wisdom) is the only thing strictly necessary for happiness. But Stoics make a puzzling second move: things like health, prosperity, and family are “preferred indifferents” — not essential to flourishing but worth pursuing. This distinguishes them from Cynics, who rejected conventional goods entirely.
Life in agreement with nature: Happiness consists in aligning your inner nature (reason) with outer nature (the cosmos). The Stoic cosmos is deterministic — everything is caused, chance is just an undiscovered cause, and from a god’s-eye view everything is determined. This is the first major philosophical theory of complete causality.
Pantheism and belonging: Stoicism is pantheistic — the divine principle (fire, logos, conscious energy) pervades everything. Each person is like a cell in a macrocosmic structure. The key concept is oikeiosis (being at home in the world). Hierocles’s concentric circles exercise — drawing the outermost circles of humanity inward, calling neighbors “uncles and aunts” — captures the Stoic vision of cosmic belonging and unity of mankind.
Contrast with Epicureanism: Where the Epicurean is atomized, the Stoic belongs. Where Epicureans withdraw from politics, Stoics engage with society and family as natural duties — though Marcus Aurelius, an emperor, wrote about internal life rather than day-to-day politics.
Epicureanism
Foundations in atomism: Epicurus adopted Democritus’s atomism — the universe is made of inanimate, impenetrable atoms moving in a void, with no divine purpose, no teleology. Life is an emergent property, not a designed one. There are infinite worlds. This removes divine control and the fear of divine punishment.
Pleasure as the goal, defined carefully: Epicurus takes pleasure and absence of pain as primary values, but this is not crude hedonism. Mental pleasures (contemplation, conversation, memory) are considered truer and more important than bodily ones. The primary aim is ataraxia — freedom from anxiety, especially fear of the gods and fear of death.
Fear of death: Lucretius’s famous argument — “when we exist, death is not there; when death is there, we are not there.” There is nothing to fear because annihilation means no subject to experience anything. The fear of being dead is confused with the anticipation of death.
Static vs. kinetic pleasure: Static pleasure is the state of equilibrium once pain of want is removed (satiation, absence of distress). Kinetic pleasure is the variation of that state — reading, conversation, enjoyment. Not all kinetic pleasures involve removing pain; some simply vary the static background. Epicurus’s own dying words illustrate this: though his stomach pain was extreme, the pleasure of conversation and memory of past times together counterbalanced it.
Desire taxonomy: Epicurus distinguishes necessary desires (food, shelter, sex), natural but not necessary desires (a nice steak vs. rotten meat), and unnecessary desires (luxury, fame, power). The unnecessary ones generate more pain than pleasure when pursued. Happiness is primarily about limiting desires, not maximizing indulgence.
Friendship and society: Friendship begins in utilitarian security — friends are useful — but can become a pleasure in itself, independent of utility. Epicureans are proto-social contract thinkers: society originates from need for security, not natural altruism. Lucretius offers an almost evolutionary account of society forming from brutish beginnings. Political participation itself is not emphasized as a pleasure, but sociality is recognized as legitimate.
Theology without intervention: Epicurus is not an atheist. He believes gods exist based on consensus omnium (universal agreement across all societies). But gods are models of beatitude — immortal, blissful, completely undisturbed — and they do not intervene in human affairs. Contemplating them as ideals is useful; fearing their punishment is the source of anxiety. Epicurus rejects both popular superstition and the sophisticated theologies of Plato and Aristotle for lacking empirical basis.
Truth and pleasure: Truth has no independent value from pleasure for Epicureans. They accept multiple explanations for distant phenomena (like eclipses) without insisting on the single correct one — a pragmatic stance. Living in error is problematic not because truth is intrinsically valuable but because error tends to produce painful anxiety.
The modern inversion: Today, many people find atheism and materialism (atoms in a void) existentially distressing — a source of nihilism. Epicurus prescribed the exact same worldview to free people from the worry of divine punishment. What moderns see as a cause of despair, Epicureans saw as a cause of happiness.
Skepticism
Two branches: Pyrrhonian skepticism (founded by Pyrrho) and Academic skepticism (arising in Plato’s Academy). Both aim at epoché — suspension of judgment — but differ in important ways.
Pyrrho and Eastern influence: Pyrrho reportedly traveled with Alexander to India and encountered “naked philosophers” (gymnosophists or Brahmins). He was famous for extraordinary imperturbability — remaining calm during storms at sea. His philosophy holds that truth about non-evident things is unattainable.
The modes: Pyrrhonists developed elaborate “modes” — systems of argument to induce suspension of judgment. They challenge empirical generalizations (people sweat in the sun — but Alexander’s butler shivered in the sun and sweaked in the cold) and theoretical claims by showing everything is from a perspective. The goal is equipollence — equal weight on both sides of any claim about the non-evident.
What they accept and reject: Pyrrhonists accept immediate sensations (fire feels warm) but refuse to theorize about why. They accept that two even numbers sum to an even number but won’t attempt to ground it in a formal system. They reject all claims about the “unseen” — Stoic cosmology, Epicurean atomism, any metaphysics.
Equipollence targets deep metaphysical claims: The equal-weight arguments work best against grand theoretical claims (the world is ordered vs. it isn’t; divine providence vs. atomistic chance) rather than everyday perceptual claims. For phenomena that seem universally true, they accept appearances without justification.
Suspension of judgment leads to tranquility: This is the most surprising and fascinating claim. The Skeptics argue that worrying about which deep theory is true is a source of disturbance. Suspending judgment — giving up on resolving unresolvable questions — produces peace of mind. Sexus Empiricus compares it to a painter who accidentally creates the perfect effect by throwing his brush at the canvas: they stumbled into tranquility as a byproduct of seeking truth and failing.
Life without belief: Skeptics advocate a life without beliefs about non-evident phenomena. This doesn’t mean they can’t function — Pyrrho lived a normal life, guided by appearances, customs, and sensations. Stories of him nearly falling off cliffs (if friends hadn’t caught him) are likely exaggerated; conventional life is protected. The target is philosophical belief, not everyday practical judgment.
Not skeptical enough?: One objection (anticipating Descartes’ evil demon) is: why trust sense perception or convention at all? Long’s response is that Pyrrhonism is ultimately an ethical philosophy, not a theoretical one — its goal is to induce tranquility, and it works. Sexus Empiricus sometimes admits that a weak counterargument suffices against a weak opposing claim, suggesting a pragmatic rather than rigorously theoretical orientation.
Academic skepticism: Arising in Plato’s Academy, Academic skeptics also suspended judgment but lacked the Pyrrhonist “modes” and ethical foundation. They were primarily critics of Stoic dogmatism. They developed probabilism — some claims are more persuasive than others, and one can act on the most probable view without claiming certainty. Cicero, an Academic skeptic, used argument from both sides not to suspend belief but to find the best view to act upon.
Key difference: Pyrrhonists claim truth exists but is undiscovered; they keep seeking equipollence. Academics (in their “negative dogmatist” phase) were accused by Pyrrhonists of denying truth is even possible — a form of dogmatism. The later probabilistic Academics were more practical and moderate.
Why These Philosophies Matter Today
Inversions of modern assumptions: The things modern people despair of — atomism, atheism, fundamental doubt — the ancients prescribed as paths to happiness. Materialism frees from fear of divine punishment. Skepticism frees from anxiety about unresolvable questions. These inversions challenge our deepest assumptions about what makes life worth living.
Ethics as first philosophy vs. modern philosophy: Modern philosophy often treats ethics as one branch among many, or reduces it to individual acts (Kantian deontology, utilitarianism). Hellenistic philosophy evaluates a whole life and character, preserves individuality (Epictetus: if you’re Agamemnon, lead the host; if you’re Thersites, make bad jokes), and treats metaphysics and logic as justified by their contribution to living well.
School-based vs. individual-based philosophy: Hellenistic thinkers packaged innovations as part of a school tradition (Stoic, Epicurean, Skeptic), tracing lineage to Socrates. Modern philosophy tends toward individual thinkers staking out unique positions. Long notes that the schools jealously maintained boundaries despite significant commonalities.
Decline and revival: The schools lost vitality in the first centuries of the Christian era — partly due to the rise of Christianity, partly due to the fashion for more spiritual, Platonic philosophy (Neoplatonism). They had a Renaissance in the actual Renaissance and continue to influence modernity. The recent revival of Stoicism in America has made these ideas newly popular.
Long’s personal relationship with the philosophies: Long was initially drawn by intellectual puzzle-solving — reconstructing fragmentary texts like a jigsaw. Only in the last 10-15 years has he found himself applying these philosophies to his own life decisions. He describes himself as a natural Epicurean in inclination, a skeptic when teaching, an Epicurean when relaxing, and a Stoic when he wants to mortify himself.
