What he does best is fantasy — fantasy that hovers between the allegorical and the mythopoeic. And this, in my opinion, he does better than any man. The critical problem with which we are confronted is whether this art — the art of myth-making — is a species of the literary art. The objection to so classifying it is that the Myth does not essentially exist in words at all.

– C.S. Lewis

From the beginning intellectuals were trying to figure out where to classify fantasy and myth. Is myth-making a literary species?

MacDonald, George. George MacDonald. United Kingdom, HarperCollins, 1946.