Aristotle's Poetics is the earliest-surviving work of dramatic theory and the first extant philosophical treatise to focus on literary theory
6 Constituent Parts
* plot (mythos)
Refers to the "structure of incidents" (actions). Key elements of the plot are reversals, recognitions, and suffering. The best plot should be "complex" (i.e. involve a change of fortune). It should imitate actions arousing fear and pity. Thus it should proceed from good fortune to bad and involve a high degree of suffering for the protagonist, usually involving physical harm or death.
Actions should be logical and follow naturally from actions that precede them. They will be more satisfying to the audience if they come about by surprise or seeming coincidence and are only afterward seen as plausible, even necessary.
When a character is unfortunate by reversal(s) of fortune (peripeteia), at first he suffers (pathos) and then he can realize (anagnorisis) the cause of his misery or a way to be released from the misery.
* character (ethos)
It is much better if a tragical accident happens to a hero because of a mistake he makes (hamartia) instead of things which might happen anyway. That is because the audience is more likely to be "moved" by it. A hero may have made it knowingly (inMedea) or unknowingly (Oedipus). A hero may leave a deed undone (due to timely discovery, knowledge present at the point of doing deed ...).
Main character should be
* good - Aristotle explains that audiences do not like, for example, villains "making fortune from misery" in the end. It might happen though, and might make the play interesting. Nevertheless, the moral is at stake here and morals are important to make people happy (people can, for example, see tragedy because they want to release their anger) * appropriate–if a character is supposed to be wise, it is unlikely he is young (supposing wisdom is gained with age) * consistent–if a person is a