Wikipedia
Ship of State
The Ship of State is a famous and oft-cited metaphor put forth by Plato in Book VI of the Republic (488e–489d). It likens the governance of a city-state to the command of a naval vessel and ultimately argues that the only men fit to be captain of this ship are philosopher kings, benevolent men with absolute power who have access to the Form of the Good. The origins of the metaphor can be traced back to the lyric poet Alcaeus (frs. 6, 208, 249), and it is found in Aeschylus' Seven Against Thebes before Plato.