Evolution of Dialog

Dialogue
Dialogue (sometimes spelled dialog in North American English[1]) is a literary and theatrical form consisting of a written or spoken conversational exchange between two or more people.
Its chief historical origins as narrative, philosophical or didactic device are to be found in classical Greek and Indian literature, in particular in the ancient art of rhetoric.
Having lost touch almost entirely in the 19th century with its underpinnings in rhetoric, the notion of dialogue emerged transformed in the work of cultural critics such as Mikhail Bakhtin and Paulo Freire, theologians such as Martin Buber, as an existential palliative to counter atomization and social alienation in mass industrial society.
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Ancient Greek philosophers, Plato and Aristotle at their center, engage in dialogue in Raphael's 16th-century depiction of The School of Athens
As literary and philosophical device
Antiquity and the middle ages
Dialogue as a genre in the Middle East and Asia dates back to Sumerian disputations preserved in copies from the early second millennium BC[2] and to Rigvedic dialogue hymns and to the Mahabharata.
Literary historians commonly suppose that in the West Plato (c. 437 BC – c. 347 BC) introduced the systematic use of dialogue as an independent literary form: they point to his earliest experiment with the genre in the Laches. The Platonic dialogue, however, had its foundations in the mime, which the Sicilian poets Sophron and Epicharmus had cultivated half a century earlier. These works, admired and imitated by Plato, have not survived but scholars imagine them as little plays, usually presented with only two performers. The Mimes of Herodas give us some idea of their scope.
Plato further simplified the form and reduced it to pure argumentative conversation, while leaving intact the amusing element of character-drawing. He must have begun this about the year 405 BC, and by 400 he had perfected the dialogue, especially in the cycle...