Was Epicurus a Psychological Hedonist, an Ethical Hedonist, Both, or Neither?

Before engaging with the debate described in this article, a preliminary warning is necessary: the terms “psychological hedonism” and “ethical hedonism” are not Epicurean terms. They were not used by Epicurus. They were not used by his immediate successors. They originate with Henry Sidgwick, a 19th-century British Utilitarian philosopher, who coined the paired labels specifically to diagnose an internal tension within Jeremy Bentham’s utilitarian theory — a theory Epicurus never held and would have found alien in important respects.

This means that every effort to place Epicurus within Sidgwick’s categories — to declare him a “psychological hedonist” or an “ethical hedonist” — is an effort to fit ancient Greek philosophy into boxes that were built for an entirely different purpose, in an entirely different intellectual context, more than two thousand years later. The exercise is not useless, as we will see: careful scholars have drawn useful observations from it, and the more defensible label, if one must be chosen, can be identified. But the exercise carries real hazards. The categories are too coarse for the philosophy they are being applied to, and spending too much effort determining which Sidgwickian box to put Epicurus in risks distorting the very philosophy one is trying to understand. The most reliable way to understand Epicurus is to read Epicurus — in his own words, on his own terms — rather than to translate him into frameworks designed for someone else.

With that warning clearly stated, we can survey the debate — because it has been conducted by serious scholars and reflects genuine questions about Epicurean texts, and those questions deserve careful answers.

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Origin and Meaning of the Terms

Psychological hedonism and ethical hedonism as a formal paired distinction were introduced by Henry Sidgwick in The Methods of Ethics (1874). Sidgwick developed the distinction because he was dissatisfied with an internal inconsistency in Bentham and Mill: Bentham had simultaneously asserted that people do always pursue pleasure (a psychological claim) and that people ought to pursue the greatest general happiness (an ethical claim), without adequately explaining how the second could have any force given the first. Sidgwick labeled these two strands “psychological hedonism” and “ethical hedonism” and treated them as the central tension in utilitarian thought.

The word “hedonism” itself, derived from the ancient Greek hēdonē (pleasure), is not much older — its earliest recorded use in English dates only to the 1850s. Neither Epicurus nor his school used the word as a label for their own philosophy.

Psychological hedonism, as Sidgwick defined it, is a descriptive thesis: the claim that all human beings are, as a matter of psychological fact, always ultimately motivated by the pursuit of pleasure and the avoidance of pain. It makes no claim about what people should do. It says this is simply how human motivation works. Everyone who does anything — including the ascetic who starves himself, the martyr who chooses death, or the Stoic who claims to be motivated by virtue alone — is, on this view, ultimately seeking something they find pleasurable.

Ethical hedonism, by contrast, is a normative or prescriptive thesis: the claim that pleasure ought to be the goal of human action — that it is the right and rational standard for living — and that actions are good insofar as they produce pleasure and bad insofar as they produce pain. It says nothing about whether people actually pursue pleasure in all their actions. It is perfectly consistent with ethical hedonism to hold that people frequently and disastrously fail to pursue pleasure, and that philosophy is needed to correct these errors.

The two theses are logically independent. You can hold ethical hedonism without holding psychological hedonism, and vice versa. The question of which Epicurus held — or whether he held both or neither — is what divides the commentators. But again: this is a question framed in someone else’s vocabulary, and that framing introduces its own distortions from the outset.

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The Case for Psychological Hedonism

Main Arguments

The central argument for reading Epicurus as a psychological hedonist begins with what scholars call the cradle argument. Epicurus appeals repeatedly to the behavior of young animals and human infants as evidence for his hedonism. The most explicit passage is in the Letter to Menoeceus: when we speak of pleasure as the goal, “we mean the absence of pain in the body and of trouble in the soul. For it is not continuous drinkings and revellings… that produce a pleasant life, but sober thinking… [But] pleasure is the beginning and end of the blessed life. We recognize pleasure as the first and innate good.” And Diogenes Laertius records that Epicurus appealed to how all animals, from birth, “rush toward pleasure and flee from pain without any reasoning.”

This appeal to what all creatures naturally do — not what they ought to do — has the character of a descriptive, empirical claim. The infant does not deliberate about whether to seek warmth or recoil from pain. If Epicurus were making only a normative claim, the behavior of infants and animals would be irrelevant evidence — they cannot deliberate about what they ought to do. The fact that he uses their behavior as evidence for his position suggests he believes the claim has empirical, psychological content.

A second argument concerns what Epicurus says we can observe about human motivation when we look past stated goals to actual behavior. Reading Principal Doctrine 25 — “If you do not on every occasion refer each of your actions to nature’s end, but turn to some other criterion in choosing or avoiding, your actions will not be consistent with your reasoning” — the scholar Raphael Woolf has argued that this doctrine makes most sense as an affirmation of psychological hedonism. On Woolf’s reading, Epicurus is saying that whatever people claim their goals to be, their actual behavior will reveal that nature’s end — pleasure — is still operating as the real motivation. The words (logoi) and the deeds (praxeis) will diverge when someone pretends to pursue something other than pleasure, because their deeds will continue tracking nature’s goal even when their words don’t.

Woolf’s 2004 paper in Phronesis — “What Kind of Hedonist Was Epicurus?” — is the most rigorous scholarly defense of the psychological reading. Woolf argues that there is considerable evidence in favor of a psychological reading of Epicurean hedonism, evidence that includes some of the very texts that Cooper cites in support of the ethical reading.

Emily Austin, in Living for Pleasure: An Epicurean Guide to Life (2023), also defends a version of the psychological reading, holding that Epicurus grounded his ethics in facts about what living creatures actually pursue by nature — making the descriptive and normative elements of the theory deeply intertwined.

Scholarly Sources Supporting the Psychological Reading

• Raphael Woolf, “What Kind of Hedonist Was Epicurus?” Phronesis 49 (2004): 303–322. The most focused defense of the psychological reading against Cooper.
• Emily Austin, Living for Pleasure: An Epicurean Guide to Life (Oxford University Press, 2023). Supports the naturalistically grounded reading of Epicurean hedonism.
• Various scholars who treat the cradle argument as evidence for psychological claims, including references in Tim O’Keefe, Epicurus on Freedom (Cambridge University Press, 2005).

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The Case for Ethical Hedonism

Main Arguments

The case for reading Epicurus as an ethical rather than psychological hedonist begins with a logical point that Larry J. Waggle puts clearly in his 2007 paper “Epicurus: Psychological or Ethical Hedonist?” published in Revista de Filosofía: if Epicurus’s ethical theory turns out to be solely one of psychological hedonism, then it is not an ethical theory. It is a descriptive theory about human motivation, and nothing more. If people inevitably and always pursue pleasure whether they want to or not, the injunction to pursue pleasure becomes vacuous — you don’t need philosophy to tell you what you’re going to do anyway. The very existence of Epicurean philosophy as a practical program for how to live implies that people can choose differently, and that the goal of the philosophy is to help them choose correctly.

John Cooper’s argument in “Pleasure and Desire in Epicurus” (in Reason and Emotion, Princeton University Press, 1999) presses this point systematically. Cooper argues that Principal Doctrine 25 is best read as warning Epicureans that they can drift away from the natural standard of pleasure — that it is genuinely possible to act in pursuit of other goals — and that philosophy is necessary precisely because this drift is a real danger. On this reading, PD 25 is not a description of how everyone inevitably behaves but an admonition about what happens when you fail to apply the Epicurean standard consistently. The fact that the warning is necessary is evidence that people are capable of genuinely departing from the pursuit of pleasure, which is only possible if psychological hedonism is false.

Waggle makes a further methodological argument: we should prioritize Epicurus’s own surviving writings over later doxographical accounts, and when we do, the prescriptive character of the ethics is unmistakable. The Letter to Menoeceus is full of oughts and imperatives — “we must practice the things that produce happiness,” “we must reckon that some desires are natural and necessary… others natural but not necessary” — none of which would make sense if the agent were determined by nature to pursue pleasure regardless. The prescriptive language requires the possibility of choosing otherwise.

Julia Annas, in The Morality of Happiness (Oxford University Press, 1993) — the most comprehensive treatment of ancient ethical theories in the eudaimonistic tradition — treats Epicurus primarily as an ethical theorist in the normative sense, showing how his account of pleasure as the final end participates in the same structure as Aristotle’s account of eudaimonia: it specifies what the good life consists in, not a mechanism that compels behavior.

Gosling and Taylor, in The Greeks on Pleasure (Oxford University Press, 1982), argue that the distinction between kinetic and katastematic pleasures in Epicurus — and the complex calculus by which some pleasures are to be avoided because they produce greater pain — presupposes genuine deliberative agency. A purely psychological hedonist account would have no room for the extensive practical reasoning Epicurus recommends.

Scholarly Sources Supporting the Ethical Reading

• John M. Cooper, “Pleasure and Desire in Epicurus,” in Reason and Emotion: Essays on Ancient Moral Psychology and Ethical Theory (Princeton University Press, 1999), pp. 485–514. The leading defense of the ethical reading.
• Larry J. Waggle, “Epicurus: Psychological or Ethical Hedonist?” Revista de Filosofía 25, no. 57 (2007): 73–88. Supports Cooper’s conclusion and adds methodological arguments about the priority of primary sources.
• Julia Annas, The Morality of Happiness (Oxford University Press, 1993). Treats Epicurus within the normative eudaimonistic tradition.
• J.C.B. Gosling and C.C.W. Taylor, The Greeks on Pleasure (Oxford University Press, 1982). Influential analysis noting that the Epicurean distinction between pleasure types presupposes deliberative agency.

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What Long, Sedley, and Tsouna Contribute

Neither A.A. Long nor David Sedley — the two most influential English-language scholars of Hellenistic philosophy — has written papers focused specifically on the psychological vs. ethical hedonism question in Epicurus. Their major collaborative work, The Hellenistic Philosophers (Cambridge University Press, 1987), presents Epicurus’s ethical hedonism primarily in its normative dimension: as an account of what the good life consists in and why pleasure is the right standard for evaluating it.

Long’s various articles on Epicurean ethics consistently treat the philosophy as a practical prescriptive program — which presupposes the ethical rather than psychological reading. Sedley’s scholarship, particularly his work on Epicurean physics and epistemology, is less directly relevant to the hedonism question, though his emphasis on Epicurean naturalism — the view that nature provides the standard for how to live — is consistent with either reading and perhaps most naturally supports the view that nature both describes what creatures pursue and prescribes what they ought to pursue.

Voula Tsouna’s work on Epicurean ethics and Philodemus, including The Ethics of Philodemus (Oxford University Press, 2007), engages extensively with Epicurean pleasure theory without specifically adjudicating the psychological vs. ethical debate — but her treatment of Epicurean therapeutic ethics presupposes that agents can make genuinely different choices, which leans toward the ethical reading.

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The Cradle Argument: Two Different Things It Might Prove

The most important textual evidence for the psychological reading is the cradle argument — the appeal to infant and animal behavior as evidence for hedonism. But what exactly does this argument prove?

Reading One: “The young of all species pursue pleasure — this is evidence that hedonism is the call of nature.”

On this reading, the cradle argument establishes that pleasure-seeking is what nature has inscribed in every living creature from birth. It is a foundational factual claim about how life works at its most basic level. The fact that infants and animals pursue pleasure before they have any capacity for deliberation shows that pleasure is nature’s own signal — the faculty it has provided for evaluating experiences. This grounds the ethical claim: pleasure ought to be the goal because nature has made it the natural good. The psychological fact and the ethical prescription are connected, but the former does not render the latter vacuous. Rather, the natural fact is what justifies the ethical norm.

Reading Two: “Everyone pursues what they think of as pleasure whether they admit it or not — this is the psychological hedonist claim.”

On this reading, the cradle argument supports the stronger claim that even adults who claim to be motivated by virtue, duty, divine command, or anything other than pleasure are actually, at a deeper level, pursuing something they find pleasurable — perhaps the pleasure of feeling virtuous, or the pleasure of avoiding guilt. The Stoic who claims to act from virtue alone is, on this view, actually pursuing the pleasure of living in conformity with his conception of reason.

Which reading is stronger?

Reading One is considerably stronger as an interpretation of Epicurus, and considerably more defensible as a philosophical position. The claim that the young of all species pursue pleasure before any deliberation is an observable, empirical fact that does genuine philosophical work. It establishes that pleasure is not an arbitrary cultural preference or a philosophical construction but a feature of how living creatures are constituted by nature. This makes it the natural standard for evaluation — the baseline against which human choices can be assessed as correct or mistaken.

Reading Two, by contrast, faces a serious problem of explanatory inflation. If every action by every person in every circumstance is “really” about pleasure at some deep level, the claim becomes unfalsifiable — and therefore philosophically empty. The Stoic who endures great pain for virtue, the ascetic who renounces bodily pleasure, the martyr who dies for a cause — all of these, on Reading Two, are “really” pursuing pleasure. But the explanation requires so many levels of reconstruction — finding the “hidden” pleasure in every self-denial — that the concept of pleasure loses any determinate content. This is precisely the problem that motivates Cooper’s objection: a purely psychological hedonism collapses into either a tautology or a form of covert determinism incompatible with the genuine agency that Epicurean philosophy presupposes.

Reading One also connects more naturally to the practical program of Epicurean philosophy. If everyone already inevitably pursues pleasure whether they know it or not (Reading Two), why is philosophy necessary? Why does Epicurus write letters urging his friends to think carefully about what they pursue, warning them against the pursuit of wealth or political power, distinguishing natural from empty desires? A philosophy addressed to people who are already guaranteed to pursue pleasure correctly is pointless. A philosophy addressed to people who need help identifying and pursuing genuine goods is urgently necessary.

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The EpicurusToday Position

The conclusion of this analysis should be stated alongside a renewed statement of its limits.

The terms “psychological hedonism” and “ethical hedonism” are alien to Epicurus. They originate with Henry Sidgwick — a 19th-century Utilitarian — and were designed to solve problems within Utilitarianism, not to illuminate Epicurean philosophy. Any reader who comes to Epicurus primarily through this lens risks squeezing an original, independently developed philosophy into a frame it was never meant to fit. The better approach — always — is to read what Epicurus actually wrote and said, in its own context, without reaching for Sidgwick’s vocabulary as an organizing tool.

That said, if one must work within the Sidgwickian categories — and scholars have done so, with results worth engaging — the most defensible conclusion is that Epicurus was primarily an ethical hedonist who used naturalistic observation to ground and justify his normative claims. His appeal to what all creatures naturally do is not a claim that all human actions are therefore automatically and inevitably directed at pleasure. It is evidence that pleasure is the right standard — that nature itself has identified it as the genuine good — and therefore that a philosophy aimed at helping people understand and pursue genuine pleasure is both necessary and correct.

The psychological element in Epicurus is real but limited: the feelings of pleasure and pain are natural, non-rational faculties that operate in all living creatures before any deliberation. This establishes their evidential authority as criteria of the good. But the fact that these faculties exist does not mean they always guide behavior correctly — false beliefs, empty desires, and philosophical errors all distort the guidance they provide. That is precisely why philosophy is necessary.

The most practically important consequence of this position is one that has been central to EpicurusToday from the beginning: the Epicurean project is not an apology for pleasure-seeking on the grounds that “everyone does it anyway.” It is a positive, freedom-affirming argument that pleasure is the right guide because nature has provided it as such, and that wisdom and reason are the instruments by which we learn to follow that guide effectively.

But we return to where we began. These labels — psychological, ethical, hedonist — are tools borrowed from a different workshop, built for different purposes. They can reveal something, used carefully. Used carelessly, or treated as the primary lens for reading Epicurus, they distort more than they illuminate. For those who want to understand Epicurus on his own terms, the right place to start is not Sidgwick, but Epicurus himself.

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Key scholarly works discussed: John M. Cooper, “Pleasure and Desire in Epicurus,” in Reason and Emotion (Princeton University Press, 1999), pp. 485–514; Raphael Woolf, “What Kind of Hedonist Was Epicurus?” Phronesis 49 (2004): 303–322; Larry J. Waggle, “Epicurus: Psychological or Ethical Hedonist?” Revista de Filosofía 25, no. 57 (2007): 73–88; Julia Annas, The Morality of Happiness (Oxford University Press, 1993); J.C.B. Gosling and C.C.W. Taylor, The Greeks on Pleasure (Oxford University Press, 1982). Discussion ongoing at EpicureanFriends.com.