How did poseidon come about?

Poseidon, the Greek god of the sea, earthquakes, and horses, emerged from ancient mythology as one of the three main deities, along with his brothers Zeus and Hades. According to myth, he was born to the Titans Cronus and Rhea. After Cronus was overthrown, the brothers drew lots to divide the cosmos, with Poseidon receiving dominion over the oceans. His character often reflects the duality of nature, embodying both the nurturing and destructive aspects of the sea.