The Theogony () is a poem by Hesiod (8th–7th century BC) describing the origins and genealogies of the Greek gods, composed .West 1966, p. 45. It is written in the epic dialect of Ancient Greek and contains 1,022 lines. It is one of the most important sources for the understanding of early Greek cosmology.

Description Hesiod's Theogony is a large-scale synthesis of a vast variety of local Greek traditions concerning the gods, organized as a narrative that tells how they came to be and how they established permanent control over the cosmos. It is the first known Greek mythical cosmogony. The initial state of the universe is chaos, a dark indefinite void considered a divine primordial condition from which everything else appeared. Theogonies are a part of Greek mythology which embodies the desire to articulate reality as a whole, to describe the entire universe and its coming into being. This universalizing impulse was fundamental to the first later (and indeed ongoing) projects of speculative theorizing. p. 28

Further, in the "Kings and Singers" passage (80–103) 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 claim 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.

Although it is often used as a sourcebook for Greek mythology,Herodotus (II.53) cited it simply as an authoritative list of divine names, attributes and functions. 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 — the often sung, descriptive works with which an ancient Greek rhapsode would begin his performance at poetic competitions. It is necessary to see the Theogony not as the definitive source of Greek mythology, but rather as a snapshot of a dynamic tradition that happened to crystallize when Hesiod formulated the myths he knew — and to remember that the traditions evolved further since that time.

The written form of the Theogony was established in the 6th century BC. Even some conservative editors have concluded that the Typhon episode (820–68) is an interpolation.F. Solmsen, Hesiod and Aeschylus (Ithaca: Cornell Studies in Classical Philology 30) 1949:53 and note 179 with citations; "if an interpolation," Joseph Eddy Fontenrose observes (Python: a study of Delphic myth and its origins: 71, note 3), "it was made early enough."

Hesiod was probably influenced by some Near-Eastern traditions, such as the Babylonian Dynasty of Dunnum, which were mixed with local traditions, but they are more likely to be lingering traces from the Mycenaean tradition than the result of oriental contacts in Hesiod's own time.

The decipherment of Hittite mythical texts, notably the Kingship in Heaven text first presented in 1946, with its castration mytheme, offers in the figure of Kumarbi an Anatolian parallel to Hesiod's Uranus–Cronus conflict.Walter Burkert, The Orientalizing Revolution: Near Eastern Influence on Greek Culture in the Early Archaic Age (Harvard University Press) 192, offers discussion and bibliography of related questions.

The succession myth

One of the principal components of the Theogony is the presentation of what is called the "succession myth", which tells how Cronus overthrew Uranus, and how in turn Zeus overthrew Cronus and his fellow Titans, and how Zeus was eventually established as the final and permanent ruler of the cosmos.Hard, pp. 65–69; West 1966, pp. 18–19.

Uranus (Sky) initially produced eighteen children with his mother Gaia (Earth): the twelve Titans, the three Cyclopes, and the three Hecatoncheires (Hundred-Handers),Theogony 132–153 (Most, pp. 12, 13). but hating them,Theogony 154–155 (Most, pp. 14, 15). Exactly which of these eighteen children Hesiod meant that Uranus hated is not entirely clear, all eighteen, or perhaps just the Cyclopes and the Hundred-Handers. Hard, p. 67; West 1988, p. 7, and Caldwell, p. 37 on lines 154–160, make it all eighteen; while Gantz, p. 10, says "likely all eighteen"; and Most, p. 15 n. 8, says "apparently only the ... Cyclopes and Hundred-Handers are meant" and not the twelve Titans. See also West 1966, p. 206 on lines 139–53, p. 213 line 154 γὰρ. Why Uranus hated his children is also not clear. Gantz, p. 10 says: "The reason for [Uranus'] hatred may be [his children's] horrible appearance, though Hesiod does not quite say this"; while Hard, p. 67 says: "Although Hesiod is vague about the cause of his hatred, it would seem that he took a dislike to them because they were terrible to behold". However, West 1966, p. 213 on line 155, says that Uranus hated his children because of their "fearsome nature". he hid them away somewhere inside Gaia.Theogony 156–158 (Most, pp. 14, 15). The hiding place inside Gaia is presumably her womb, see West 1966, p. 214 on line 158; Caldwell, p. 37 on lines 154–160; Gantz, p. 10. This place seems also to be the same place as Tartarus, see West 1966, p. 338 on line 618, and Caldwell, p. 37 on lines 154–160. Angry and in distress, Gaia fashioned a sickle made of adamant and urged her children to punish their father. Only her son Cronus, the youngest Titan, was willing to do so.Theogony 159–172 (Most, pp. 16, 17). So Gaia hid Cronus in "ambush" and gave him the adamantine sickle, and when Uranus came to lie with Gaia, Cronus reached out and castrated his father.Theogony 173–182 (Most, pp. 16, 17); according to Gantz, p. 10, Cronus waited in ambush, and reached out to castrate Uranus, from "inside [Gaia's] body, we will understand, if he too is a prisoner". This enabled the Titans to be born and Cronus to assume supreme command of the cosmos.Hard, p. 67; West 1966, p. 19. As Hard notes, in the Theogony apparently, although the Titans were freed as a result of Uranus' castration, the Cyclopes and Hundred-Handers remain imprisoned (see below), see also West 1966, p. 214 on line 158.

Cronus, having now taken over control of the cosmos from Uranus, wanted to ensure that he maintained control. Uranus and Gaia had prophesied to Cronus that one of Cronus' own children would overthrow him, so when Cronus married Rhea, he made sure to swallow each of the children she birthed: Hestia, Demeter, Hera, Hades, Poseidon, and Zeus (in that order), to Rhea's great sorrow.Theogony 453–467 (Most, pp. 38, 39). However, when Rhea was pregnant with Zeus, Rhea begged her parents Gaia and Uranus to help her save Zeus. So they sent Rhea to Lyctus on Crete to bear Zeus, and Gaia took the newborn Zeus to raise, hiding him deep in a cave beneath Mount Aigaion.Theogony 468–484 (Most, pp. 40, 41). Mount Aigaion is otherwise unknown, and Lyctus is nowhere else associated with Zeus' birth, later tradition located the cave on Mount Ida, or sometimes Mount Dikte, see Hard, pp. 74–75; West 1966, pp. 297–298 on line 477, p. 300 on line 484. Meanwhile, Rhea gave Cronus a huge stone wrapped in baby's clothes which he swallowed thinking that it was another of Rhea's children.Theogony 485–491 (Most, pp. 40, 41).

Zeus, now grown, forced Cronus (using some unspecified trickery of Gaia) to disgorge his other five children.Theogony 492–500 (Most, pp. 42, 43). Zeus then released his uncles the Cyclopes (apparently still imprisoned beneath the earth, along with the Hundred-Handers, where Uranus had originally confined them) who then provide Zeus with his great weapon, the thunderbolt, which had been hidden by Gaia.Theogony 501–506 (Most, pp. 42, 43); Hard, pp. 68–69; West 1966, p. 206 on lines 139–153, pp. 303–305 on lines 501–506. According to Apollodorus, 1.1.4–5, after the overthrow of Uranus, the Cyclopes (as well as the Hundred-Handers) were rescued from Tartarus by the Titans, but reimprisoned by Cronus. A great war was begun, the Titanomachy, between the new gods, Zeus and his siblings, and the old gods, Cronus and the Titans, for control of the cosmos. In the tenth year of that war, following Gaia's counsel, Zeus released the Hundred-Handers, who joined the war against the Titans, helping Zeus to gain the upper hand. Zeus then cast the fury of his thunderbolt at the Titans, defeating them and throwing them into Tartarus,Theogony 624–733 (Most, pp. 52–61). This is the sequence of events understood to be implied in the Theogony by, for example, Hard, p. 68; Caldwell, p. 65 on line 636; and West 1966, p. 19. However according to Gantz, p. 45, "Hesiod's account does not quite say whether the Hundred-Handers were freed before the conflict or only in the tenth year. ... Eventually, if not at the beginning, the Hundred-Handers are fighting". thus ending the Titanomachy.

A final threat to Zeus' power was to come in the form of the monster Typhon, son of Gaia and Tartarus. Zeus with his thunderbolt was quickly victorious, and Typhon was also imprisoned in Tartarus.Theogony 820–868 (Most, pp. 68, 69).

Zeus, by Gaia's advice, was elected king of the gods, and he distributed various honors among the gods.Theogony 881–885 (Most, pp. 72, 73). Zeus then married his first wife Metis, but when he learned that Metis was fated to produce a son which might overthrow his rule, by the advice of Gaia and Uranus, Zeus swallowed Metis (while still pregnant with Athena). And so Zeus managed to end the cycle of succession and secure his eternal rule over the cosmos.Theogony 886–900 (Most, pp. 74, 75).

The genealogies

The first gods The world began with the spontaneous generation of four beings: first arose Chaos (Chasm); then came Gaia (Earth), "the ever-sure foundation of all"; "dim" Tartarus, in the depths of the Earth; and Eros (Desire) "fairest among the deathless gods".Theogony 116–122 (Most, pp. 12, 13). West 1966, p. 192 line 116 Χάος, "best translated Chasm"; Most, p. 13, translates Χάος as "Chasm", and notes: (n. 7): "Usually translated as 'Chaos'; but that suggests to us, misleadingly, a jumble of disordered matter, whereas Hesiod's term indicates instead a gap or opening". Other translations given in this section follow those given by Caldwell, pp. 5–6. From Chaos came Erebus (Darkness) and Nyx (Night). And Nyx "from union in love" with Erebus produced Aether (Brightness) and Hemera (Day).Theogony 123–125 (Most, pp. 12, 13). From Gaia came Uranus (Sky), the Ourea (Mountains), and Pontus (Sea).Theogony 126–132 (Most, pp. 12, 13).

Children of Gaia and Uranus Uranus mated with Gaia, and she gave birth to the twelve Titans: Oceanus, Coeus, Crius, Hyperion, Iapetus, Theia, Rhea, Themis, Mnemosyne, Phoebe, Tethys and Cronus;Theogony 132–138 (Most, pp. 12, 13). the Cyclopes: Brontes, Steropes and Arges;Theogony 139–146 (Most, pp. 14, 15). and the Hecatoncheires ("Hundred-Handers"): Cottus, Briareos, and Gyges.Theogony 147–153 (Most, pp. 14, 15).

Children of Gaia and Uranus' blood, and Uranus' genitals

When Cronus castrated Uranus, from Uranus' blood which splattered onto the earth, came the Erinyes (Furies), the Giants, and the Meliai (the nymphs of the ash tree). Cronus threw the severed genitals into the sea, around which foam developed and transformed into the goddess Aphrodite.Theogony 173–206 (Most, pp. 16, 17).

Descendants of Nyx