Final answer:
The first being born from Chaos is not unequivocally defined in Greek mythology, with different texts suggesting various primordial deities. Gaia often comes first as the personification of Earth, though other accounts, like Orphic texts, focus on Zeus's role. Myths are non-linear, hence 'first' isn't as straightforward a concept.
Step-by-step explanation:
The first being born from Chaos in Greek mythology is not explicitly named as a single entity due to varying sources and interpretations. In Hesiod's 'Theogony', which is one of the main sources for Greek creation myths, Chaos is described as the primeval void state from which the first gods emerged. In different accounts, from this primordial existence, Gaia (Mother Earth), Tartarus (the Abyss), Eros (Desire), Erebus (Darkness), and Nyx (Night) are among the first beings to emerge. However, in terms of being born from Chaos, Gaia often comes first in myths as the personification of the Earth and one of the Greek primordial deities.
Adding complexity to the Greek creation myths are other sources such as the Orphic Theogony, which may present different views on these primordial beginnings. The Orphic traditions often advance the supremacy of Zeus in the creation narrative. However, it should be noted that the very concept of 'first' may not apply as straightforwardly to myths as they do to historical events, given that mycological narratives can be non-linear and symbolic.
The Greek pantheon, which includes gods and goddesses with their respective hierarchies and assignments, plays a significant role in explaining the origins of cosmos and order from chaos, an idea deeply rooted in the Greek psyche, seeking to understand the world around them. The divine hierarchy is mirrored in expectations of human society, where the Greeks sought to find their own order, as further elaborated in Greek mythology and philosophy.