Three-act structure

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The three-act structure is a model used in narrative fiction that divides a story into three parts (acts), often called the Setup, the Confrontation, and the Resolution. It was popularized by Syd Field in his 1979 book Screenplay: The Foundations of Screenwriting. Based on his recommendation that a play have a "beginning, middle, and end," the structure has been falsely attributed to Aristotle, who in fact argued for a two-act structure consisting of a "complication" and "dénouement" split by a peripeteia.^[1]