Which ancient Greek poet wrote 'Theogony'?

The ancient Greek poet who wrote Theogony was Hesiod. The poem explains the origins and genealogies of the Greek gods, including the rise of Zeus to cosmic power.

Hesiod probably lived and worked during the late eighth or early seventh century BC, around the same broad period as Homer. Unlike Homeric epic, Theogony presents a systematic genealogy: Chaos appears first, followed by primordial beings such as Gaia, Tartarus, and Eros, then the Titans and Olympian gods.

Theogony is written in the traditional epic language and meter associated with Homer, but Hesiod gives the poet a more visible personal voice. He describes the Muses meeting him on Mount Helicon and granting him poetic authority. Readers sometimes confuse Hesiod with Homer because both are foundational Greek poets, but their subjects differ: Homer is chiefly associated with heroic epic, while Hesiod is especially associated with divine origins and practical moral instruction in Works and Days.