πρόλογος

Prologue derives from Greek πρόλογος (prologos), a compound of πρό (pro, 'before') and λόγος (logos, 'word, speech, discourse'). In its original theatrical context, the prologos was the section of a Greek tragedy or comedy that preceded the entrance of the chorus — the parodos — and served to establish the dramatic situation for the audience. The prologos was typically delivered by one or two actors who explained the background of the myth being dramatized, identified the setting, and established the emotional tone. In Euripidean tragedy, the prologue became almost formulaic: a single character appeared before the audience and delivered an expository monologue that laid out the circumstances of the play. Aristophanes famously mocked this convention, having characters in his comedies parody the predictable opening speeches of Euripides. But the convention served a practical purpose in a culture without programs or playbills: the prologue told the audience what they needed to know.

The structural importance of the prologue reflected a deeper Greek understanding of narrative. Aristotle, in his Poetics, defined the prologue as the part of a tragedy before the first choral entry, and he analyzed its function within the larger architecture of dramatic form. For Aristotle, a well-constructed play had clearly defined parts — prologue, parodos, episodes, stasima, exodos — each serving a distinct function in the unfolding of the plot. The prologue was the ground-laying, the foundation upon which the dramatic structure would be built. This architectural metaphor was not accidental: the Greeks thought of plays as constructed things, built from component parts, and the prologue was the cornerstone. The Latin tradition inherited both the word and the concept: Roman playwrights like Plautus and Terence used prologues to address the audience directly, sometimes pleading for favorable reception or attacking rival playwrights.

Medieval and Renaissance drama extended the prologue beyond its Greek structural role into a more flexible device. In medieval mystery plays, a presenter or expositor figure delivered prologues that framed the biblical narrative for an audience that might not be literate. Shakespeare used prologues sparingly but memorably — the Chorus in Henry V asks the audience to imagine the fields of France from the confines of a wooden theater, and Romeo and Juliet opens with a sonnet that reveals the lovers' fate before the story begins. Chaucer's Canterbury Tales features an elaborate General Prologue that introduces each pilgrim before the tales commence, extending the theatrical device into narrative poetry. The prologue had become a versatile literary convention, usable in any genre where context needed to be established before the main narrative began.

Today prologue functions in literature, film, and everyday speech as the name for any preliminary section that establishes context. Novels frequently open with prologues set years before the main action, establishing the backstory that will drive the plot. Films use prologues — often a sequence before the title card — to create mystery or establish atmosphere. In speech, 'by way of prologue' introduces background information before the speaker reaches their main point. The word has also acquired a figurative sense: an event can be described as 'a prologue to disaster' or 'a prologue to war,' meaning a preliminary condition that foreshadows what follows. This figurative usage preserves the Greek dramatic sense precisely: the prologue is the part that makes the coming action intelligible, the speech before the word that gives the word its meaning. Every story needs its ground-laying, its before-word, the context without which the action that follows would be unintelligible.