"Myths of origin" or "creation myths" represent an attempt to understand the universe in human terms and explain the origin of the world. The most widelyaccepted at the time, but a philosophical account of the beginning of things, is the collection by Hesiod in his Theogony. It begins with Chaos, a deep void. From thisemerged Gaea (Earth) and some other primary divine beings: Eros (Love), the Abyss (Tartarus), and the Erebus. Without male assistance, Gaia gave birth toUranus (Heaven), who then fertilized. From this union came first the Titans:Oceanus, Coeus, cryo, Hyperion, Iapetus, Tea, Rhea, Themis, Mnemosyne, Phoebe, Tethys, and Cronus. After this, Gaia and Uranus decreed that no morewould be born Titans, so that followed the one-eyed Cyclopes and the Hundred-handers or Centimanos. Cronus ("the youngest, twisted mind, the most terrible of the children [of Gaia]") castrated his father and became the ruler of the gods with his sister-wife Rhea as spouse and the other Titans as their court.
Chaos god of universe
Gea god of the earth
Eros god of love

Cronus ate his children
Opinion: In itself, this is an introduction to the greatest beings representing basic and important things to Greek mythology.