Peripeteia /ˌpɛrəpᵻˈtaɪ.ə/ (Greek: περιπέτεια) is a reversal of circumstances, or turning point. The term is primarily used with reference to works of literature. The Anglicized form of peripeteia is peripety.
Aristotle, in his Poetics, defines peripeteia as "a change by which the action veers round to its opposite, subject always to our rule of probability or necessity." According to Aristotle, peripeteia, along with discovery, is the most effective when it comes to drama, particularly in a tragedy. He wrote that "The finest form of Discovery is one attended by Peripeteia, like that which goes with the Discovery in Oedipus...".
Aristotle says that peripeteia is the most powerful part of a plot in a tragedy along with discovery. A peripety is the change of the kind described from one state of things within the play to its opposite, and that too in the way we are saying, in the probable or necessary sequence of events. There is often no element like Peripeteia; it can bring forth or result in terror, mercy, or in comedies it can bring a smile or it can bring forth tears (Rizo). This is the best way to spark and maintain attention throughout the various form and genres of drama "Tragedy imitates good actions and, thereby, measures and depicts the well-being of its protagonist. But in his formal definition, as well as throughout the Poetics, Aristotle emphasizes that" ... Tragedy is an imitation not only of a complete action, but also of events inspiring fear or pity" (1452a 1); in fact, at one point Aristotle isolates the imitation of "actions that excite pity and fear" as "the distinctive mark of tragic imitation" (1452b 30). Pity and fear are effected through reversal and recognition; and these "most powerful elements of emotional interest in Tragedy-Peripeteia or Reversal of the Situation, and recognition scenes-are parts of the plot (1450a 32). has the shift of the tragic protagonist's fortune from good to bad, which is essential to the plot of a tragedy. It is often an ironic twist. Good uses of Peripeteia are those that especially are parts of a complex plot, so that they are defined by their changes of fortune being accompanied by reversal, recognition, or both" (Smithson).