-Explores ways in which genres of Western literature fall into his four mythoi
-Theory of modes, or historical criticism (tragic, comic, and thematic
-Theory of symbols, or ethical criticism (literal/descriptive, formal, mythical, and anagogic)
-Theory of myths, or archetypal criticism (comedy, romance, tragedy, irony/satire)
-Theory of genres, or rhetorical criticism (epos, prose, drama, lyric)