Roman literature was from its very inception influenced heavily by Greek authors. Some of the earliest works we possess are of historical epics telling the early military history of Rome. As the republic expanded, authors began to produce poetry, comedy, history, and tragedy. Virgil represents the pinnacle of Roman epic poetry. His Aeneid tells the story of flight of Aeneas from Troy and his settlement of the city that would become Rome.[citation needed] Lucretius, in his On the Nature of Things, attempted to explicate science in an epic poem. The genre of satire was common in Rome, and satires were written by, among others, Juvenal and Persius. The rhetorical works of Cicero are considered[by whom?] to be some of the best bodies of correspondence recorded in antiquity.[citation needed]