Tragedy
Etymology

The word "tragedy" appears to have been used to describe different phenomena at different times. It derives from Classical Greek τραγῳδία, contracted from trag(o)-aoidiā = "goat song", which comes from tragos = "he-goat" and aeidein = "to sing" (cf. "ode"). Scholars suspect this may be traced to a time when a goat was either the prize in a competition of choral dancing or was what a chorus danced around prior to the animal's ritual sacrifice. In another view on the etymology, Athenaeus of Naucratis (2nd–3rd century CE) says that the original form of the word was trygodia from trygos (grape harvest) and ode (song), because those events were first introduced during grape harvest.

Writing in 335 BCE (long after the Golden Age of 5th-century Athenian tragedy), Aristotle provides the earliest surviving explanation for the origin of the dramatic art form in his Poetics, in which he argues that tragedy developed from the improvisations of the leader of choral dithyrambs (hymns sung and danced in praise of Dionysos, the god of wine and fertility):

Anyway, arising from an improvisatory beginning (both tragedy and comedy—tragedy from the leaders of the dithyramb, and comedy from the leaders of the phallic processions which even now continue as a custom in many of our cities), grew little by little, as developed whatever of it had appeared; and, passing through many changes, tragedy came to a halt, since it had attained its own nature.

In the same work, Aristotle attempts to provide a scholastic definition of what tragedy is:

Tragedy is, then, an enactment of a deed that is important and complete, and of magnitude, by means of language enriched, each used separately in the different parts: it is enacted, not recited, and through pity and fear it effects relief (catharsis) to such emotions.

There is some dissent to the dithyrambic origins of tragedy, mostly based on the differences between the shapes of their choruses and styles of dancing. A common descent from pre- Hellenic fertility and burial rites has been suggested. Friedrich Nietzsche discussed the origins of Greek tragedy in his early book The Birth of Tragedy (1872). Here, he suggests the name originates in the use of a chorus of goat-like satyrs in the original dithyrambs from which the tragic genre developed.

Scott Scullion writes:

There is abundant evidence for tragoidia understood as "song for the prize goat". The best-known evidence is Horace, Ars poetica 220-24 ("he who with a tragic song competed for a mere goat"); the earliest is the Parian Marble, a chronicle inscribed about 264/63 BCE, which records, under a date between 538 and 528 BCE: "Thespis is the poet... first produced... and as prize was established the billy goat" (FrGHist 239A, epoch 43); the clearest is Eustathius 1769.45: "They called those competing tragedians, clearly because of the song over the billy goat"...
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