Chaos, in Greek Mythology according to Hesiod, is the first primordial god to appear in the universe, therefore the oldest of the divine consciousness forms. The divine nature of Chaos is difficult to understand, due to the changes that the idea of "chaos" has undergone over time. Its name derives from the Greek verb chaíno (χαίνω), which means "to separate", "to be ample", meaning the primordial empty space. It could also be called Aer (Αηρ), which means "air" or Anapnoe (Αναπνοη), which means "to breathe".
The Roman poet Ovid was the first to attribute the notion of disorder and confusion to the chaos deity. However, Chaos would be the opposite of Eros for the Greeks. Both Chaos and his brothers are the generating forces of the universe. Chaos seems to be a catabolic force, which it generates through fission, just like the most primitive organisms studied by biology, while Eros is a force of junction and union. Chaos means something like "cut", "crack", "split" or "separation".