In Ancient Greek drama, particularly old comedy (fifth century B.C.), agon refers to the formal convention according to which the struggle between the characters should be scripted in order to supply the basis of the action. Agon is a formal debate which takes place between the chief characters in a Greek play, protagonist and antagonist, usually with the chorus acting as judge. The meaning of the term has escaped the circumscriptions of its classical origins to signify, more generally, the conflict on which a literary work turns.
Harold Bloom in The Western Canon uses the term agon to refer to the attempt by a writer to resolve an intellectual conflict between his ideas and the ideas of an influential predecessor in which "the larger swallows the smaller", such as in chapter 18, Joyce's Agon with Shakespeare.
In sociopolitical theory, agon can refer to the idea that the clash of opposing forces necessarily results in growth and progress. (Colaguori 2012)
Agon is the name of a 1957 ballet by George Balanchine, with music by Igor Stravinsky.