Chapter 1
Imitation as the common principle
The Poetics announces its scope immediately: poetry in itself, its kinds, the essential quality of each. Aristotle then makes the foundational claim — all poetry, all music, all dance are modes of imitation. They differ in three ways: the medium (rhythm, language, harmony), the objects (persons of higher or lower moral type), and the manner (narrative or dramatic). The chapter surveys the arts in order: flute and lyre use harmony and rhythm; dancing uses rhythm alone; poetry uses language, in prose or verse. Some arts — tragedy and comedy — combine all three means. The chapter is taxonomic and rapid: Aristotle is establishing the framework that everything else will build on.
Chapter 2
Objects of imitation
The chapter covers the second dimension: the objects of imitation. All arts imitate people in action, but those people must be of higher or lower moral type than the norm — better than we are, worse than we are, or roughly as we are. This division maps directly onto the main literary kinds: tragedy imitates the better, comedy the worse. Aristotle closes with an analogy to painters: Polygnotus drew people better than they are; Pauson drew them worse; Dionysius drew them as they are. Brief and direct — two paragraphs establishing the axis that matters most for the definition of tragedy in chapter 6.
Chapter 3
Manner of imitation
The third chapter covers the third dimension: manner. With the same medium and the same objects, a poet may narrate (adopting another persona, as Homer does, or speaking in his own person) or may present the characters directly in action and speech. Aristotle notes that this gives three possibilities: pure narration, pure dramatic presentation, or a mixture. He then observes that Sophocles and Homer both imitate elevated characters, but Homer narrates while Sophocles presents dramatically. The chapter is three paragraphs, closing the taxonomic introduction. Aristotle has now established all three dimensions of difference — medium, object, manner — and can proceed to the kinds of poetry.
Chapter 4
Origins of poetry
Poetry, Aristotle argues, has two natural causes. First: the human instinct for imitation from childhood — we are the most imitative of animals, and we take pleasure in likenesses even of things painful in life, because in the representation we are also learning. Second: the instinct for harmony and rhythm. Starting from these, some people developed comedy, others tragedy. Aristotle sketches the history: Homer wrote both elevated epic and the comic Margites, prefiguring the split. Tragedy grew from the leaders of the dithyramb, comedy from the leaders of the phallic songs. Key technical development: Aeschylus added the second actor and diminished the Chorus; Sophocles added a third actor and scene-painting. Poetry reached its natural forms and stopped — as comedy and tragedy each found their proper types.
Chapter 5
Comedy and epic
A brief chapter establishing the positions of comedy and epic relative to tragedy. Comedy imitates persons of lower type — not wicked, since the ludicrous is a subdivision of the ugly that is non-painful and non-destructive. Its history is poorly recorded. Epic poetry agrees with tragedy in imitating elevated characters in verse, but differs: epic uses one meter and is narrative, where tragedy is dramatic; epic has no fixed length, tragedy aims at a single revolution of the sun (or not much more). Their constituent parts partially overlap — whatever knows tragedy also knows epic. The chapter clears the ground for tragedy's formal definition in chapter 6.
Chapter 6
The definition of tragedy
Chapter 6 is the heart of the treatise. Aristotle gives the formal definition of tragedy: the imitation of a serious, complete action of a certain magnitude, in embellished language, dramatically rather than narratively, through pity and fear accomplishing the catharsis of such emotions. From this definition, the six parts of tragedy are derived: plot, character, thought, diction, song, spectacle — in that order of importance. Plot is first because tragedy imitates not persons but actions and life; character is second; thought third. The chapter insists with unusual force that plot is the soul of tragedy and that character, however important, is subordinate to the structure of the action.
Chapter 7
Magnitude and unity of plot
Having established that plot is first, Aristotle specifies what a plot must be. A whole has a beginning, a middle, and an end — not as accidents, but by definition: a beginning is what does not necessarily follow from something else; an end is what naturally follows from something else but is followed by nothing; a middle follows from something and is followed by something. This logical structure must be matched by appropriate magnitude. An object too small to be perceived gives no pleasure; one too large cannot be comprehended as a whole. For tragedy, the right size is what allows a sequence of events probable or necessary to bring about a change from good fortune to bad (or vice versa) — long enough for such a sequence, short enough to be held in the memory as a unity.
Chapter 8
Unity of plot
A single paragraph making a precise and important correction: unity of plot does not mean unity of the hero. Many poets have made this mistake, writing a "life of Heracles" or "life of Theseus" on the assumption that the unity of the person guarantees the unity of the plot. Homer does not make this mistake. The Iliad tells not the whole Trojan War, not the whole life of Achilles, but one action within it — the wrath of Achilles — and even the subsidiary episodes are made organic to that action. A plot is unified when taking away or rearranging any part would damage or displace the whole. This is the test of unity.
Chapter 9
Poetry vs history
Chapter 9 opens with the most quoted argument in the Poetics: poetry is more philosophical and more serious than history, because history relates the particular — what happened — while poetry relates the universal — what could happen given a certain kind of person in a certain situation. The poet's freedom from historical fact allows him to construct events according to probability and necessity, and this makes poetry a vehicle of universal truth. The chapter goes on to distinguish episodic plots (the worst kind — events succeed each other without probable or necessary sequence) from the best tragic plots, in which events come on the audience by surprise but are causally connected to what preceded. Surprise and causality together produce the most fully tragic effect.
Chapter 10
Simple and complex plots
A short chapter establishing the key distinction in plot construction. A simple action is one that changes continuously without reversal or recognition — the protagonist moves from good to bad fortune by a direct sequence of probable or necessary events. A complex action is one in which the change of fortune is accompanied by reversal (peripeteia), recognition (anagnorisis), or both — and these must arise from the internal structure of the plot, not from external accident. The next chapter will define these terms. This chapter establishes the taxonomy and makes clear that the complex is the higher kind.
Chapter 11
Reversal, recognition, suffering
The chapter defines peripeteia and anagnorisis, the two central technical terms of the Poetics. Reversal is the change by which an action veers to its opposite — the messenger arrives to free Oedipus and instead reveals that he killed his father and married his mother. Recognition is the change from ignorance to knowledge, especially of one's true situation or relationships. The best recognition — as in Oedipus — arises from the plot itself and coincides with the reversal. A third element is added: the scene of suffering (pathos), which involves a destructive or painful action. The chapter is brief but contains the conceptual core around which dramatic theory has circled ever since.
Chapter 12
Quantitative parts
A technical chapter, probably an interpolation, giving the quantitative rather than qualitative parts of tragedy: prologue (the part before the first choral song), parode (first entrance of the Chorus), episode (the parts between choral songs), stasimon (choral song without dialogue), and exode (the final part after the last choral song). Some tragedies also include kommos (a lyric dialogue between Chorus and actor). The chapter is not integrated with the surrounding argument about plot quality and is generally thought to be an addition to the original text — but it names the formal structure that a Greek audience would have recognised in every play they saw.
Chapter 13
The tragic plot
The chapter asks what kind of change of fortune produces the distinctive tragic effect — pity and fear. Aristotle eliminates three wrong answers: (1) A good person falling from prosperity produces shock but not cathartic pity and fear. (2) A bad person falling from prosperity produces neither pity nor fear but only satisfaction. (3) A thoroughly bad person rising produces neither. The right protagonist is intermediate: a man of good character, not pre-eminently virtuous, who falls through hamartia — error or misjudgment, not wickedness. Oedipus is the model. The second-best type of plot is the double plot (like the Odyssey), with opposite outcomes for good and bad — popular but artistically inferior.
Chapter 14
Pity and fear from incidents
The chapter asks how pity and fear are best produced. Through spectacle is the inferior method; through the structure of the plot itself is the better way. The incidents that matter are those involving persons connected by bonds of love or kinship — an enemy killing an enemy produces no pity; a friend killing a friend strikes the deepest. Four cases arise from the distinction between acting in knowledge or ignorance, and acting or stopping before acting. Aristotle's ranking: best is when the deed is done in ignorance and discovery comes after (Oedipus); next is when it is about to be done and is stopped by recognition in time; next is when it is done knowingly (Medea); worst is when it is about to be done knowingly and is stopped. The chapter establishes that the quality of tragic pity and fear depends on the nature of the relationships involved.
Chapter 15
Character in tragedy
Four rules for character in tragedy. First and most important: character must be good — even a subordinate figure, even a woman or a slave, must have some moral purpose. Second: character must be appropriate to the type — courage in a woman is different from courage in a man. Third: character must be like the real — resembling human nature. Fourth: character must be consistent — even an inconsistent character should be consistently inconsistent. Aristotle adds: character, like plot, should follow necessity or probability; the denouement must arise from the plot itself, not from a god machine. Sophocles drew men as they ought to be; Euripides drew them as they are. Both are valid but Sophocles is the higher standard.
Chapter 16
Forms of recognition
A taxonomy of recognition (anagnorisis), ranked from least to most artistic. First: recognition by signs — birthmarks, objects, tokens — the least artistic, used most commonly. Second: recognition invented by the poet and not arising from the plot — artless. Third: recognition through memory — seeing a picture or hearing a song triggers recollection. Fourth: recognition by reasoning — inferring that someone must be the person from the facts at hand. Fifth (implied): recognition by a false inference on the part of another character. Sixth and best: recognition arising from the incidents themselves, through the natural and necessary course of events — as in Oedipus and in the Iphigenia of Euripides. The chapter establishes a clear hierarchy: the closer to plot necessity, the better.
Chapter 17
Practical advice for the poet
Aristotle shifts to practical construction. Three pieces of advice. First: place the scene before your eyes as if you were a spectator — see everything with the utmost vividness before writing. This makes errors of inconsistency less likely. Second: work out the play with appropriate gestures, because those who feel emotion are most convincing — sympathy with the characters comes naturally to the one who represents them. Third: sketch the general outline first, then fill in the episodes. Aristotle illustrates with an example from Iphigenia: the general story can be told in a few sentences; the episode within that story is what the poet then develops. The names being given, the poet's work is to fill in the probable or necessary action.
Chapter 18
Complication and unraveling
Every tragedy falls into two halves: complication (desis) — the part where the action is entangled, including everything before the change of fortune — and unraveling (lysis) — the part from the beginning of the change to the end. Aristotle ranks the four kinds of tragedy: complex (reversal and recognition), pathetic (driven by passion), ethical (driven by character), and spectacular (driven by spectacle). He insists that a tragedy should not have a multiplicity of plots — an epic structure does not translate to the stage. The chapter ends with the requirement that the Chorus be treated as one of the actors, integral to the action in the manner of Sophocles, not interpolated as in Euripides.
Chapter 19
Thought and diction
A brief transitional chapter. Thought — the third part — covers everything the characters say when they argue, prove, disprove, arouse emotion, or magnify and minimise. This belongs to the theory of rhetoric; the Rhetoric covers it fully. Diction — the fourth part — is the expression of meaning in words, the same in verse and prose. Its investigation occupies chapters 20-22. The chapter is a two-paragraph hinge, acknowledging what has already been treated (plot, character) and pointing toward what remains (diction, which then gets three chapters). Aristotle does not dwell here; the book accelerates into the technical analysis of language.
Chapter 20
Parts of language
The most technical chapter in the treatise, covering the parts of language in sequence from smallest to largest. A letter is an indivisible sound capable of forming part of a group; letters divide into vowels, semivowels, and mutes. A syllable is a non-significant sound composed of a mute and a vowel. A connecting word is a non-significant sound that enables or joins significant sounds. A noun is a composite significant sound without temporal marking. A verb is a composite significant sound with temporal marking. An inflexion is the modification of noun or verb for case, number, or mood. A sentence is a composite significant sound some of whose parts are significant. The chapter is dense grammatical taxonomy — the driest in the Poetics.
Chapter 21
Kinds of words
A taxonomy of the kinds of words available to the poet. Simple: composed of non-significant elements. Double: composed of significant and non-significant, or two significant elements. Every word is one of: current (in general use), strange (in use elsewhere), metaphorical, ornamental, newly coined, lengthened, contracted, or altered. Metaphor gets the fullest treatment: it is the application of an alien name by transference — from genus to species, species to genus, species to species, or by analogy. The proportional metaphor (A:B::C:D) is Aristotle's most developed form. The chapter establishes the toolkit; chapter 22 will specify when to use each kind.
Chapter 22
Diction
The chapter synthesises the taxonomy from chapter 21 into practical principles of style. The ideal style is clear without being mean — clarity comes from current words; elevation comes from strange words, compound words, and metaphor; but too much of the elevated produces bombast, too much of the current produces flatness. The solution: blend — use strange and metaphorical words sparingly, as seasoning. Compound words suit dithyrambic poetry; rare words suit heroic; metaphor suits iambic. The greatest single gift: the command of metaphor, which cannot be taught but only possessed, because seeing similarity between distant things requires a natural eye. The chapter closes the analysis of diction and summarises the balance that characterises the best poetic style.
Chapter 23
Epic structure
A single paragraph applying the principles of plot construction to epic. The requirement is the same as for tragedy: a single action, whole and complete, with beginning, middle, and end — so that the poem may produce its proper pleasure as a unified whole. Homer's Iliad is again the example: it does not tell the whole Trojan War (beginning with the eggs of Leda and ending with the return) but focuses on one action, using everything else as episodes organically connected to it. Other epic poets fail this test — they write about one man or one era, but the incidents are merely sequential, not structurally unified. The chapter is a one-paragraph statement of principle, setting up the extended comparison in chapter 24.
Chapter 24
Epic compared with tragedy
Epic must have the same kinds as tragedy — simple, complex, ethical, pathetic — and the same parts except song and spectacle. It differs in length and meter: epic uses the heroic hexameter because it is the most stately and dignified, admitting strange and metaphorical words. Epic can extend its dimensions more than tragedy because the reader does not see the actors; the poet can describe simultaneous actions. Homer alone among epic poets understood his proper role — speaking as little as possible in his own person. Epic permits the wonderful more easily than tragedy, since the impossible is not seen but heard. Aristotle closes: the diction should be elaborated in pauses, not over the moments of character and thought.
Chapter 25
Critical objections answered
The longest chapter, and in some ways the most practical. Aristotle systematically addresses the five sources from which critics draw objections to specific passages in poetry: (1) things described as impossible; (2) things described as irrational; (3) things described as morally harmful; (4) things described as contradictory; (5) things described as contrary to artistic correctness. For each kind, he gives the appropriate defence — appealing to artistic effect, to the "higher truth," to received opinion, to careful reading, to ambiguity, to usage, or to accent and punctuation. The chapter is a tool for defending Homer and the tragedians against their critics, and it illustrates how detailed Aristotle's reading of specific passages was.
Chapter 26
The verdict: tragedy is superior
The closing chapter addresses the question of relative rank. The objection to tragedy is that it requires exaggerated gesticulation from the actors — a lower art. Aristotle's response: this objection applies to acting, not to the poetic art itself. Read on the page, tragedy is just as good as epic. As for the specific comparison: tragedy has all the epic elements plus music and spectacle; it achieves its effect in shorter compass; it is more unified; and it produces its pleasure more concentratedly. The ending is clean and definitive: tragedy is superior to epic because it better fulfils the function proper to its kind. The Poetics ends.