The On Poems by Philodemus of Gadara (c.110-35 BC), the Epicurean philosopher and poet who taught Vergil and influenced Horace, is our main source for Hellenistic literary and critical theory, bridging the gap between Aristotle and Horace. In Book 2 Philodemus rebuts two almost unknown critics, Heracleodorus and Pausimachus, who argued, respectively, that the sound arising from the word-order (synthesis) is the source of poetic excellence, regardless...