Chaos (Greek χάος, khaos) refers to the formless or void state preceding the creation of the universe or cosmos in the Greek creation myths, or to the initial "gap" created by the original separation[clarification needed] of heaven and earth.  
Greek χάος means "emptiness, vast void, chasm, abyss", from the verb χαίνω, "gape, be wide open, etc.", from Proto-Indo-European *ǵheh2n, cognate to Old English geanian, "to gape", whence English yawn. It may also mean space, the expanse of air, and the nether abyss, infinite darkness.
Hesiod and the Pre-Socratics use the Greek term in the context of cosmogony. Hesiod's "chaos" has been interpreted as a moving, formless mass from which the cosmos and the gods originated. In Hesiod's opinion the origin should be indefinite and indeterminate, and it represents disorder and darkness. Chaos has been linked with the term tohu wa-bohu of Genesis 1:2 . The term may refer to a state of non-being prior to creation or to a formless state. In the Book of Genesis, the spirit of God is moving upon the face of the waters, and the earliest state of the universe is like a "watery chaos". The Septuagint makes no use of χάος in the context of creation, instead using the term for גיא, "chasm, cleft", in Micah 1:6 and Zacharia 14:4.
Of the certain uses of the word chaos in Theogony, in the creation the word is referring to a "gaping void" which gives birth to the sky, but later the word is referring to the gap between the earth and the sky, after their separation. A parallel can be found in the Genesis. In the beginning God creates the earth and the sky. The earth is "formless and void" (tohu wa-bohu), and later God divides the waters under the firmament from the waters over the firmament, and calls the firmament "heaven".
Nevertheless, the term chaos has been adopted in religious studies as referring to the primordial state before creation, strictly combining two separate notions of primordial waters or a primordial darkness from which a new order emerges and a primordial state as a merging of opposites, such as heaven and earth, which must be separated by a creator deity in an act of cosmogony. In both cases, chaos referring to a notion of a primordial state contains the cosmos in potentia but needs to be formed by a demiurge before the world can begin its existence.
In modern biblical studies, the term chaos is commonly used in the context of the Torah and their cognate narratives in Ancient Near Eastern mythology more generally. Parallels between the Hebrew Genesis and the Babylonian Enuma Elish were established by Hermann Gunkel in 1910. Besides Genesis, other books of the Old Testament, especially a number of Psalms, some passages in Isaiah and Jeremiah and the Book of Job are relevant.
The motif of Chaoskampf (German for "struggle against chaos") is ubiquitous in myth and legend, depicting a battle of a culture hero deity with a chaos monster, often in the shape of a serpent or dragon. The same term has also been extended to parallel concepts in the religions of the Ancient Near East, such as the abstract conflict of ideas in the Egyptian duality of Maat and Isfet.
The origins of the Chaoskampf myth most likely lie in the Proto-Indo-European religion whose descendants almost all feature some variation of the story of a storm god fighting a sea serpent representing the clash between the forces of order and chaos. Early work by German academics such as Gunkel and Bousset in comparative mythology popularized translating the mythological sea serpent as a "dragon." Indo-European examples of this mythic trope include Thor vs. Jörmungandr (Norse), Tarhunt vs. Illuyanka (Hittite), Indra vs. Vritra (Vedic), Fereydun vs. Aži Dahāka (Avestan), and Zeus vs. Typhon (Greek) among others.
Influence on Greek philosophy
In the Theogony of Hesiod, Chaos is a divine primordial condition, which is the origin of the gods, and all things. It seems that in Hesiod's opinion, the origin should be indefinite and indeterminate, and it may represent infinite space, or formless matter. The notion of the temporal infinity was familiar to the Greek mind from remote antiquity in the religious conception of immortality. This idea of "the divine" as an origin, influenced the first Greek philosophers. The main object of the first efforts to explain the world remained the description of its growth, from a beginning. They believed that the world arose out from a primal unity, and that this substance was the permanent base of all its being. It seems that Anaximander was influenced by the traditional popular conceptions and Hesiod's thought, when he claims that the origin is apeiron (the unlimited), a divine and perpetual substance less definite than the common elements. Everything is generated from apeiron, and must return there according to necessity. A popular conception of the nature of the world, was that the earth below its surface stretches down indefinitely and has its roots on or above Tartarus, the lower part of the underworld. In a phrase of Xenophanes, "The upper limit of the earth borders on air, near our feet. The lower limit reaches down to the "apeiron" (i.e. the unlimited). The sources and limits of the earth, the sea, the sky, Tartarus, and all things are located in a great windy-gap, which seems to be infinite, and is a later specification of "chaos". Primal Chaos was sometimes said to be the true foundation of reality, particularly by philosophers such as Heraclitus.
For Hesiod and the early Greek Olympian myth (8th century BC), Chaos was the first of the primordial deities, followed by Gaia (Earth), Tartarus and Eros (Love). From Chaos came Erebus and Nyx.
Passages in Hesiod's Theogony suggest that Chaos was located below Earth but above Tartarus. Primal Chaos was sometimes said to be the true foundation of reality, particularly by philosophers such as Heraclitus.
Ovid (1st century BC), in his Metamorphoses, described Chaos as "a rude and undeveloped mass, that nothing made except a ponderous weight; and all discordant elements confused, were there congested in a shapeless heap."
The Greco-Roman tradition of Prima Materia, notably including 5th and 6th centuries Orphic cosmogony was merged with biblical notions (Tehom) in Christian belief and inherited by alchemy and Renaissance magic.
The cosmic egg of Orphism was taken as the raw material for the alchemical magnum opus in early Greek alchemy. The first stage of the process of producing the Lapis Philosophorum, i.e., nigredo, was identified with chaos. Because of association with the creation in Genesis, where "the Spirit of God moved upon the face of the waters" (Gen. 1:2), Chaos was further identified with the element Water.
Alchemy in the Middle Ages and Renaissance
Blessed Raimundus Lullus (1232–1315) wrote a Liber Chaos, in which he identifies Chaos as the primal form or matter created by God.
Swiss alchemist Paracelsus (1493–1541) uses chaos synonymously with element (because the primeval chaos is imagined as a formless congestion of all elements). Paracelsus thus identifies Earth as "the chaos of the gnomi", i.e., the element of the gnomes, through which these spirits move unobstructed as fish do through water, or birds through air.
An alchemical treatise by Heinrich Khunrath, printed in Frankfurt in 1708, was entitled Chaos. The 1708 introduction to the treatise states that the treatise was written in 1597 in Magdeburg, in the author's 23rd year of practicing alchemy. The treatise purports to quote Paracelsus on the point that "The light of the soul, by the will of the Triune God, made all earthly things appear from the primal Chaos."
Martin Ruland, in his 1612 Lexicon Alchemiae, states, "A crude mixture of matter or another name for Materia Prima is Chaos, as it is in the Beginning."
The term gas in chemistry was coined by Dutch chemist J. B. Van Helmont in the 17th century, directly based on the Paracelsian notion of chaos. The g in gas is due to the Dutch pronunciation of this letter as a spirant, also employed to pronounce Greek χ.
- Chaos (mythology)
- Chaos magic
- Creatio ex nihilo
- Greek primordial gods
- Myth of redemptive violence
- Tohu wa bohu
- Chaos as a scientific term
- Chaos in Cornelius Castoriadis' thought
- Void in Alain Badiou's thought
- How to Kill a Dragon
- Euripides Fr.484, Diodorus DK68,B5,1, Apollonius Rhodius I,49 Kirk p.42
- Kirk, Raven & Schofield 2003, p. 42
- Kirk, Raven & Schofield 2003, p. 44
- R. S. P. Beekes, Etymological Dictionary of Greek, Brill, 2009, pp. 1614 and 1616–7.
- "chaos". Online Etymology Dictionary.
- Lidell-Scott, A Greek–English Lexiconchaos
- Kirk, Raven & Schofield 2003, p. 57
- Richard F. Moorton, Jr. (2001). "Hesiod as Precursor to the Presocratic Philosophers: A Voeglinian View". Retrieved 2008-12-04.
- O. Gigon (1968) Der Ursprung der griechischen Philosophie. Von Hesiod bis Parmenides. Bale. Stuttgart, Schwabe & Co. p29
- The Theogony of Hesiod Transl.H.G.Evelyn White (736-744)
- Tsumura, D., Creation and Destruction. A Reappraisal of the Chaoskampf Theory in the Old Testament, Winona Lake/IN, 1989, 2nd ed. 2005, ISBN 978-1-57506-106-1.
- C. Westermann, Genesis, Kapitel 1-11, (BKAT I/1), Neukirchen-Vluyn, 1974, 3rd ed. 1983.
- William Keith Chambers Guthrie (2000). A History of Greek Philosophy. Cambridge University Press. ISBN 9780521294201. pp. 59, 60, 83 ISBN 0-521-29420-7
- Genesis 1:2, English translation (New International Version)(2011): BibleGateway.com Biblica incorporation
- Mircea Eliade, article "Chaos" in Religion in Geschichte und Gegenwart, 3rd ed. vol. 1, Tübingen, 1957, 1640f.
- Gerhard May, Schöpfung aus dem Nichts. Die Entstehung der Lehre von der creatio ex nihilo, AKG 48, Berlin / New York, 1978, 151f.
- H. Gunkel, Genesis, HKAT I.1, Göttingen, 1910.
- Michaela Bauks, Chaos / Chaoskampf[permanent dead link], WiBiLex – Das Bibellexikon (2006).
- Michaela Bauks, Die Welt am Anfang. Zum Verhältnis von Vorwelt und Weltentstehung in Gen 1 und in der altorientalischen Literatur (WMANT 74), Neukirchen-Vluyn, 1997.
- Michaela Bauks, ''Chaos' als Metapher für die Gefährdung der Weltordnung', in: B. Janowski / B. Ego, Das biblische Weltbild und seine altorientalischen Kontexte (FAT 32), Tübingen, 2001, 431-464.
- Stephen Gosson, The schoole of abuse, containing a plesaunt inuectiue against poets, pipers, plaiers, iesters and such like caterpillers of a commonwelth (1579), p. 53 (cited after OED): "They make their volumes no better than [...] a huge Chaos of foule disorder."
- Watkins, Calvert (1995). How to Kill a Dragon: Aspects of Indo-European Poetics. London: Oxford University Press. ISBN 978-0-19-514413-0
- W. Jaeger (1953). The Theology of the early Greek philosophers. The Gifford lectures p.33:Nilsson, Vol I, p.743
- W. K. Guthrie (1952) :The Presocratic World-picture p.87: Nilsson, Vol I, p.743
- Kirk, Raven & Schofield 2003, pp. 9, 10, 20
- Hesiod Theogony 740-765: 
- Hesiod, Theogony 116–122.
- Hesiod, Theogony 123–124.
- Gantz, p. 3; Hesiod, Theogony 813–814, 700; cf. 740.
- Ovid. Metamorphoses 1.5–9
- Ante mare et terras et quod tegit omnia caelum
- unus erat toto naturae vultus in orbe,
- quem dixere chaos: rudis indigestaque moles
- nec quicquam nisi pondus iners congestaque eodem
- non bene iunctarum discordia semina rerum.
- De Nymphis etc. Wks. 1658 II. 391
- full title: Vom Hylealischen, das ist Pri-materialischen Catholischen oder Allgemeinen Natürlichen Chaos der naturgemässen Alchymiae und Alchymisten (google books edition of the 1708 print), also given as Vom hylealischen Chaos der naturgemässen Alchymiae und Alchymisten ed. 1990, ISBN 3-201-01501-6.
- Urszula Szulakowska, The alchemy of light: geometry and optics in late Renaissance alchemical illustration, vol. 10 of Symbola et Emblemata - Studies in Renaissance and Baroque Symbolism, BRILL, 2000, ISBN 978-90-04-11690-0, ch. 7 (pp. 79ff).
- Szulakowska (2000), p. 91, quoting Chaos p. 68.
- "halitum illum Gas vocavi, non longe a Chao veterum secretum." Ortus Medicinæ, ed. 1652, p. 59a, cited after OED.
- G. S. Kirk; J. E. Raven; M. Schofield (2003). The Presocratic philosophers. Cambridge University Press. ISBN 0-521-27455-9.
- Clifford, Richard J, "Creation and Destruction: A Reappraisal of the Chaoskampf Theory in the Old Testament", Catholic Biblical Quarterly, 2007.
- Day, John, God's conflict with the dragon and the sea: echoes of a Canaanite myth in the Old Testament, Cambridge Oriental Publications, 1985, ISBN 978-0-521-25600-1.
- Gantz, Early Greek Myth: A Guide to Literary and Artistic Sources, Johns Hopkins University Press, 1996, Two volumes: ISBN 978-0801853609 (Vol. 1), ISBN 978-0801853623 (Vol. 2).
- Hesiod, Theogony, in The Homeric Hymns and Homerica with an English Translation by Hugh G. Evelyn-White, Cambridge, MA.,Harvard University Press; London, William Heinemann Ltd. 1914.
- Smith, William; Dictionary of Greek and Roman Biography and Mythology, London (1873). "Chaos"
- Wyatt, Nick, Arms and the King: The Earliest Allusions to the Chaoskampf Motif and their Implications for the Interpretation of the Ugaritic and Biblical Traditions (1998), republished in There's such divinity doth hedge a king: selected essays of Nicolas Wyatt on royal ideology in Ugaritic and Old Testament literature, Society for Old Testament Study monographs, Ashgate Publishing, 2005, ISBN 978-0-7546-5330-1, 151-190.