"But he who thinks that in the written word there is necessarily much which is not serious, and that neither poetry nor prose, spoken or written, is of any great value, if, like the compositions of the rhapsodes, they are only recited in order to be believed, and not with any view to criticism or instruction; and who thinks that even the best of writings are but a reminiscence of what we know, and that only in principles of justice and goodness and nobility taught and communicated orally for the sake of instruction and graven in the soul, which is the true way of writing, is there clearness and perfection and seriousness, and that such principles are a man's own and his legitimate offspring;-being, in the first place, the word which he finds in his own bosom; secondly, the brethren and descendants and relations of his others;-and who cares for them and no others-this is the right sort of man; and you and I, Phaedrus, would pray that we may become like him."

Attributed to Socrates, written down by Plato (in Phaedrus) ca. 360BC. http://classics.mit.edu/Plato/phaedrus.html

Postmodernist comedy has a surprisingly long history, it appears.