Hiero

Hiero (Greek: Ἱέρων, Hiéron) is a minor work by Xenophon, set as a dialog between Hiero, tyrant of Syracuse, & the lyric poet Simonides about 474 BCE. In it Xenophon argues that a tyrant doesn't have any more access to happiness than a private person.
The dialog—like many of Xenophon's works—doesn't receive much scholarly attention today. However, it was the nominal subject of Leo Strauss' analysis On Tyranny, which initiated his famous dialog with Alexandre Kojève on the role of philosophy in politics.