"Hiero" is a work in the form of a letter in which the ancient Greek writer Xenophon addresses the ruler of Syracuse, Hieron, with the question of fair governance. The author examines the themes of power, wisdom, justice and happiness, revealing his vision of an ideal state. "Hieron" leaves the reader with an idea about important aspects of the state system and power, and also inspires to think about the values that a true leader should have.