answers: Aeschylus
context: the Satyr play. Gradually, the language became more serious and the meter changed from trochaic tetrameter to the more prosaic iambic trimeter. In Herodotus "Histories" and later sources, the lyric poet Arion of Methymna is said to be the inventor of the dithyramb. The dithyramb was originally improvised, but later written down before performance. The Greek chorus of up to 50 men and boys danced and sang in a circle, probably accompanied by an aulos, relating to some event in the life of Dionysus. Scholars have made a number of suggestions about the way the dithyramb changed into tragedy. "Somebody, </s> him as a radical democrat close to Themistocles. Besides introducing dialogues in iambic trimeter and including female characters for the first time, Phrynichus also introduced historical content to the genre of tragedy (e.g. in the "Capture of Miletus"). His first victory in a contest was in 510 BC. At this time, the organization of plays into trilogies began. Aeschylus was to establish the basic rules of tragic drama. He is credited with inventing the trilogy, a series of three tragedies that tell one long story, and introduced the second actor, making the dramatization of a conflict possible. Trilogies were performed </s> in masks), and made special use of the trochaic tetrameter. Aelian (Claudius Aelianus), in his "Varia Historia" (3.8), says that Phrynichus' martial verses so stirred the people of Athens, they made him a general. Fragments of his work exist in Johann August Nauck's "Tragicorum graecorum fragmenta" (1887), pp 720–725. Phrynichus (tragic poet) Phrynichus (; ), son of Polyphrasmon the Elder and pupil of Thespis, was one of the earliest of the Greek tragedians. Some of the ancients regarded him as the real founder of tragedy. Phrynichus is said to have died in Sicily. His son Polyphrasmon was also a playwright.
question: who is considered the father of the greek tragedy