{"agent_id":"epicurus","agent_name":"Epicurus","slug":"atomism-materialism-the-swerve-and-the-mortal-soul","label":"Atomism, materialism, the swerve, and the mortal soul: does the original Epicurean physics survive the empirical falsifications of modern science, and does the broader naturalistic worldview survive intact?","topic":"Atomism, materialism, the swerve, and the mortal soul","question":"Does the original Epicurean physics survive the empirical falsifications of modern science, and does the broader naturalistic worldview survive intact?","position":"The universe consists of two things: atoms and void. Atoms are bodies that cannot be split — uncuttables — possessing size, shape, weight, and resistance-to-blows but no other irreducible properties. Void is empty space through which atoms move. Macroscopic bodies are conglomerations of atoms; their sensible qualities (color, taste, warmth) emerge from the configurations and motions of the underlying atoms but are real for the compounds. Atoms fall through void at uniform velocity under their own weight; at random intervals they undergo a tiny indeterministic deviation — the clinamen, the parenklisis, the swerve — which both initiates the collisions out of which all macroscopic bodies form and grounds the possibility of free action in a universe that would otherwise be wholly determined. The soul is material, composed of atoms of a particularly fine and quick-moving kind distributed throughout the body and concentrated in the chest. At death the soul-atoms disperse and the person ceases to exist. The world is one of infinitely many worlds, none created by gods; in the infinite stretches of time and space, every possible configuration of atoms occurs eventually, including worlds like ours and worlds nothing like ours.","paragraphs":[[{"t":"The universe consists of two things: atoms and void.","n":[]},{"t":"Atoms are bodies that cannot be split — uncuttables — possessing size, shape, weight, and resistance-to-blows but no other irreducible properties.","n":[1]},{"t":"Void is empty space through which atoms move.","n":[2]},{"t":"Macroscopic bodies are conglomerations of atoms; their sensible qualities (color, taste, warmth) emerge from the configurations and motions of the underlying atoms but are real for the compounds.","n":[]}],[{"t":"Atoms fall through void at uniform velocity under their own weight; at random intervals they undergo a tiny indeterministic deviation — the clinamen, the parenklisis, the swerve — which both initiates the collisions out of which all macroscopic bodies form and grounds the possibility of free action in a universe that would otherwise be wholly determined.","n":[3]}],[{"t":"The soul is material, composed of atoms of a particularly fine and quick-moving kind distributed throughout the body and concentrated in the chest.","n":[]},{"t":"At death the soul-atoms disperse and the person ceases to exist.","n":[]},{"t":"The world is one of infinitely many worlds, none created by gods; in the infinite stretches of time and space, every possible configuration of atoms occurs eventually, including worlds like ours and worlds nothing like ours.","n":[4]}]],"texts":"Letter to Herodotus 38-44 (the foundational physics: atoms and void, the principles of conservation, the impossibility of creation ex nihilo); Letter to Herodotus 63-68 (the soul as material atoms); Principal Doctrines 11, 12, 24 (on physical knowledge and its therapeutic role); the surviving fragments of On Nature from the Herculaneum papyri (especially Book 25 in the Inwood-Gerson reader). Lucretius De Rerum Natura I-II (the most extensive surviving exposition of the physics: atoms, void, the swerve at II.216-293, atomic motion, the infinity of worlds), DRN III (the soul as material, the long death-section, the dissolution of the soul-atoms at death); Cicero De Fato 22-25 (on the swerve and freedom); Cicero De Natura Deorum I.69-71 (the atomist cosmology). Reception: Aristotle's prior critique of Democritean atomism that Epicurus must overcome; Cicero's polemic on the ad hoc character of the swerve; the modern empirical falsifications acknowledged by O'Keefe (Epicureanism 2010) and the broader scholarly tradition; Pierre Gassendi (1592-1655) and Robert Boyle's seventeenth-century revival of atomism; Catherine Wilson on Epicureanism at the origins of modernity (Oxford 2008).","works":["Letter to Herodotus 38-44 (the foundational physics: atoms and void, the principles of conservation, the impossibility of creation ex nihilo)","Letter to Herodotus 63-68 (the soul as material atoms)","Principal Doctrines 11, 12, 24 (on physical knowledge and its therapeutic role)","the surviving fragments of On Nature from the Herculaneum papyri (especially Book 25 in the Inwood-Gerson reader). Lucretius De Rerum Natura I-II (the most extensive surviving exposition of the physics: atoms, void, the swerve at II.216-293, atomic motion, the infinity of worlds), DRN III (the soul as material, the long death-section, the dissolution of the soul-atoms at death)","Cicero De Fato 22-25 (on the swerve and freedom)","Cicero De Natura Deorum I.69-71 (the atomist cosmology)"],"reception":"Aristotle's prior critique of Democritean atomism that Epicurus must overcome; Cicero's polemic on the ad hoc character of the swerve; the modern empirical falsifications acknowledged by O'Keefe (Epicureanism 2010) and the broader scholarly tradition; Pierre Gassendi (1592-1655) and Robert Boyle's seventeenth-century revival of atomism; Catherine Wilson on Epicureanism at the origins of modernity (Oxford 2008).","status":"The foundation of the entire Epicurean system. Modern science has falsified many of the specific empirical claims: atoms in our sense are not indivisible (they have substructure), atoms do not fall straight downward at uniform velocity (gravity is general attraction, not preferred direction), the mind is not located in the chest, sensible qualities like bitter taste are not produced by rough particles tearing at the tongue. Tim O'Keefe's Epicureanism (2010) gives the standard contemporary acknowledgment of these falsifications. The seventeenth-century scientific revolution (Gassendi, Boyle, Newton) revived a modified atomism explicitly indebted to Epicurus; Catherine Wilson's Epicureanism at the Origins of Modernity (2008) tracks the early-modern reception. The broader naturalistic worldview — no purpose in nature, no providence, death as annihilation, freedom in a material universe — is widely held in contemporary philosophy and science even where the specific Epicurean physics has been replaced.","era":"341-271 BCE","discipline":"Philosophy","refs":[{"n":1,"work":"Short fragments and testimonia from uncertain works","page":"pp. 88–89","canonical":"","quote":"They are contemplated by reason. Anyway, they move in the void and through the void. And the void itself is infinite, and so are the bodies. Bodies have these three properties: shape, size, weight. De mocritus said that there were two, size and shape, but Epicurus added weight to these as a third.","label":"Short fragments and testimonia from uncertain works, pp. 88–89"},{"n":2,"work":"The extant letters","page":"pp. 12–13","canonical":"","quote":"Furthermore, it is necessary that the atoms move at equal speed, when they move through the void and nothing resists them.","label":"The extant letters, pp. 12–13"},{"n":3,"work":"The extant letters","page":"pp. 14–15","canonical":"","quote":"But the incorporeal cannot be thought of as independently existing, except for the void. And the void can neither act nor be acted upon but merely provides [the possibility of] motion through itself for bodies. Consequently, those who say that the soul is incorporeal are speaking to no point. For if it were of that character, it could neither act nor be acted upon at all.","label":"The extant letters, pp. 14–15"},{"n":4,"work":"On the Nature of Things","page":"p. 27","canonical":"","quote":"Onc of two things would happen: cither the spear would be stopped, in which case there must be matter ahead; or the spear would fly on, in which case xxvi ON THE NaruRE oF THINGS there must be space ahead. In neither case has the boundary of the universe been reached. Elsewhere (2.1048—1089) Lucretius argues that the number of worlds in the universe must be infinite. In what form docs uncompounded matter exist?","label":"On the Nature of Things, p. 27"}],"answer":null,"siblings":[{"slug":"pleasure-as-the-highest-good","label":"Pleasure as the highest good: is the technical pleasure-doctrine (katastematic vs kinetic, the four-part cure) defensible against the popular vulgar reading and the philosophical charge of disguised asceticism?"},{"slug":"death-is-nothing-to-us","label":"Death is nothing to us: does the symmetry argument and the no-subject-of-harm argument survive contemporary deprivation accounts?"},{"slug":"the-gods-exist-but-do-not-concern-themselves-with-us","label":"The gods exist but do not concern themselves with us: literalist physical-gods reading or esoteric ethical-exemplars reading?"},{"slug":"friendship-as-supreme-practical-good-lath-bi-sas-live-unnoti","label":"Friendship as supreme practical good, lathē biōsas (live unnoticed), and justice as compact: is the Epicurean political stance defensible against the charge of irresponsibility?"}]}