Theogony
Theogony is a poem by Hesiod describing the origins of the gods of Greek Mythology.
Hesiod's Theogony is a large-scale synthesis of a vast variety of local Greek traditions concerning the gods, organized along the lines of a narrative that tells how they came to be and how they established permanent control over the cosmos. In many cultures, narratives about the cosmos and about the gods that shaped it constitute a way for society to reaffirm its native cultural traditions. Specifically, theogonies tend to affirm kingship as the natural embodiment of society. What makes the Theogony of Hesiod unique is that it affirms no historical royal line. Such a gesture would have sited the Theogony in one time and one place. Rather, the Theogony affirms the kingship of the god Zeus himself over all the other gods and over the whole cosmos.
Further, Hesiod appropriates to himself the authority usually reserved to sacred kingship. The poet declares that it is he, where we might have expected some king instead, upon whom the Muses have bestowed the two gifts of a scepter and an authoritative voice (Hesiod, Theogony 30-3), which are the visible signs of kingship. It is not that this gesture is meant to make Hesiod a king. Rather, the point is that the authority of kingship now belongs to the poetic voice, the voice that is declaiming the Theogony.
After the classical period, when divinely-appointed kingship is brought into Greece once more, it will come in from outside, from Macedonia and imported from the royal traditions of Persia
Indeed, although it is often used as a sourcebook for Greek mythology, the Theogony is both more and less than that. In formal terms, it is a hymn invoking Zeus and the Muses: parallel passages between it and the much shorter Homeric Hymn to the Muses make it clear that the Theogony developed out of a tradition of hymnic preludes with which ancient Greek bards would begin their recitations at peotic competitions. It is necessary, therefore, to see the Theogony not as a sort of Bible of Greek mythology, but rather as kind of snapshot of a dynamic and often contradictory tradition as it happened to crystallize at one particular place and time - and to remember that the tradition kept evolving all the way up to the time of Nonnus.
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