Genesis

Creation of the World
The oldest records of the origin of creation in Greek mythology are preserved in the Hesiod`s epic poem Theogony, dating back between 750BC and 650BC when Hesiod was believed to be active.

According to Theogony, there was only Khaos at the beginning as primeval state of existence. It was stationary, dark and silent and there was no trace of life to the infinity. Chaos was also referred as the gaping void or abyss from which everything else sprang. However, in Theogony Chaos never creates Gaia (Earth), but it seems that Gaea just appears out of this dark void.

Hesiod - Theogony, transladed by Hugh G. Evelyn White:

"(ll. 116-138) Verily at the first Chaos came to be, but next wide-bosomed Earth, the ever-sure foundations of all"

And just like Gaea, Tartarus, the terrible and sunless region beneath Gaea, also appeared along in the depths of the wide-path earth. But they were not the only ones who appeared out of the endless void. Hesiod also talks about the deathless gods who hold the peaks of snowy Olympus and Eros (love or desire to re-produce) being the fairest among them. After that, Erebus (region where the death dwells) and Nyx (black night) were born out of Chaos. Out of the union of Nyx and Erebus, Aether (the upper atmosphere) and Hemera (the day) came forth. Meanwhile, Gaea gave birth to Ouranós (the heavens) who was equal to her. She also gave birth to Ourea (gods of mountains) and Pontus (primeval god of sea). Gaea then covered herself in love with Ouranós and from their union came twelve Titans, three Cyclopes and three Hecatonchires.

The birth of the children disrupted the life of Ouranós who saw them as threat to his throne. And therefore, he imprisoned Cyclopes and Hecatonchires, who seemed the most bizzare of his children, in the depths of Tartarus, away from the other gods. But Gaea, as their mother, loved her children unconditionally. She became mad and started plotting against Ouranós. She even talked her children into castrating him. All of them were afraid of their father except Cronus, who wanted the throne for himself, and with the help of his brothers Crius, Coeus, Iapetus and Hyperion who held Ouranós down, when caught by surprise, Cronus was able to castrate his father with the flint sickle, made by Gaea. After castration, Cronus threw the genitals of his father into the ocean. On the spot where genitals fell into the water, Aphrodite was born. And from the blood of Ouranós that spilt on the earth, Giants, the Ash-tree nymphs and Erinyes were born.