The main theme of the creation myth in Greek mythology revolves around the emergence of order from chaos. Initially, there existed only Chaos, a void from which primordial entities like Gaia (Earth), Uranus (Sky), and Tartarus (the Underworld) were born. This myth encapsulates the transition from nothingness to the structured cosmos, ultimately leading to the rule of the gods and the establishment of divine order. The narrative underscores the significance of creation and the evolution of the universe through complex relationships and conflicts among divine beings.