{"agent_id":"spinoza","agent_name":"Baruch Spinoza","slug":"mind-body-parallelism-two-attributes-of-one-substance","label":"Mind-body parallelism / two attributes of one substance: are mind and body two distinct things requiring causal interaction, or one and the same individual conceived under two attributes?","topic":"Mind-body parallelism / two attributes of one substance","question":"Are mind and body two distinct things requiring causal interaction, or one and the same individual conceived under two attributes?","position":"The order and connection of ideas is the same as the order and connection of things (E2p7). The thinking substance and the extended substance are not two substances at all but one and the same substance, conceived now under one attribute, now under another. A circle existing in nature and the idea of that circle — which is also in God under the attribute of Thought — are one and the same thing, expressed through different attributes (E2p7s). The human mind is the idea of the human body (E2p11-p13); the body is the human being conceived under the attribute of Extension; the mind is the same human being conceived under the attribute of Thought. The mind does not causally produce changes in the body, nor does the body causally produce changes in the mind, because modes of one attribute cannot causally cross over to modes of another attribute (E3p2). Cartesian interactionism, with its struggle to locate the seat of mind-body causation somewhere in the pineal gland, was solving the wrong problem. The mental and the physical are not two parallel causal sequences requiring coordination; they are the same causal sequence expressed in two different idioms. The supposed problem of mental causation does not require a solution; the metaphysics dissolves the problem.","paragraphs":[[{"t":"The order and connection of ideas is the same as the order and connection of things (E2p7).","n":[]},{"t":"The thinking substance and the extended substance are not two substances at all but one and the same substance, conceived now under one attribute, now under another.","n":[]},{"t":"A circle existing in nature and the idea of that circle — which is also in God under the attribute of Thought — are one and the same thing, expressed through different attributes (E2p7s).","n":[]}],[{"t":"The human mind is the idea of the human body (E2p11-p13); the body is the human being conceived under the attribute of Extension; the mind is the same human being conceived under the attribute of Thought.","n":[1]},{"t":"The mind does not causally produce changes in the body, nor does the body causally produce changes in the mind, because modes of one attribute cannot causally cross over to modes of another attribute (E3p2).","n":[2]}],[{"t":"Cartesian interactionism, with its struggle to locate the seat of mind-body causation somewhere in the pineal gland, was solving the wrong problem.","n":[]},{"t":"The mental and the physical are not two parallel causal sequences requiring coordination; they are the same causal sequence expressed in two different idioms.","n":[]},{"t":"The supposed problem of mental causation does not require a solution; the metaphysics dissolves the problem.","n":[3,4]}]],"texts":"Ethics E2p7 ('The order and connection of ideas is the same as the order and connection of things'); E2p7s (the famous scholium where the doctrine is generalized: 'a circle existing in nature and the idea of an existing circle, which is also in God, are one and the same thing, which is explained through different attributes'); E2p11-p13 (the human mind as the idea of the human body); E2p21s (the scholium on the unity of mind-and-body); E3p2 (mind and body cannot causally interact across attributes); the related material in the Short Treatise II.20 and Letter 64 to Schuller. Reception: Cartesian dualism (Descartes's Meditations VI and the Passions of the Soul) as the position parallelism is constructed against; Leibniz's pre-established harmony as the closest seventeenth-century alternative; Martin Lin's chapter in the Cambridge Companion (2022) on the metaphysics of thought and extension; Della Rocca's Representation and the Mind-Body Problem in Spinoza (1996); contemporary engagement with neutral monism (Russell, Strawson, Chalmers) and the explanatory gap.","works":["Ethics E2p7 ('The order and connection of ideas is the same as the order and connection of things')","E2p7s (the famous scholium where the doctrine is generalized: 'a circle existing in nature and the idea of an existing circle, which is also in God, are one and the same thing, which is explained through different attributes')","E2p11-p13 (the human mind as the idea of the human body)","E2p21s (the scholium on the unity of mind-and-body)","E3p2 (mind and body cannot causally interact across attributes)","the related material in the Short Treatise II.20 and Letter 64 to Schuller"],"reception":"Cartesian dualism (Descartes's Meditations VI and the Passions of the Soul) as the position parallelism is constructed against; Leibniz's pre-established harmony as the closest seventeenth-century alternative; Martin Lin's chapter in the Cambridge Companion (2022) on the metaphysics of thought and extension; Della Rocca's Representation and the Mind-Body Problem in Spinoza (1996); contemporary engagement with neutral monism (Russell, Strawson, Chalmers) and the explanatory gap.","status":"One of Spinoza's most-vindicated philosophical positions in the history of reception. Cartesian interactionist dualism had collapsed under its own difficulties by the early eighteenth century; Leibniz's pre-established harmony was a structurally similar attempt at coordination requiring divine intervention to maintain the parallelism Spinoza grounded in metaphysics. Twentieth-century philosophy of mind has rediscovered the Spinozist structure under various names: neutral monism (Russell's The Analysis of Mind 1921; Galen Strawson's recent work); double-aspect theories; property dualism with monistic substance. Martin Lin's Cambridge Companion chapter (2022) argues that contemporary philosophy of mind keeps re-encountering parallelism without naming it. Della Rocca's Representation and the Mind-Body Problem in Spinoza (1996) is the rigorous analytic-historical reconstruction of the doctrine. The contemporary debate concerns precisely how to read the relation between same individual and two attributes, and whether the doctrine is best read as a token-identity theory, a property-dualism with monistic substance, or something else for which contemporary categories may be inadequate.","era":"1632-1677","discipline":"Philosophy","refs":[{"n":1,"work":"Ethics","page":"","canonical":"","quote":"Thus every man will follow this or that train of thought, according as he has been in the habit of conjoining and associating the mental images of things in this or that manner. PROP. XIX. The human mind has no knowledge of the body, and does not know it to exist, save through the ideas of the modifications whereby the body is affected. Proof.--The human mind is the very idea or knowledge of the human body (II.","label":"Ethics"},{"n":2,"work":"Ethics","page":"","canonical":"","quote":"Therefore our mind, &c. Q.E.D. Corollary.--Hence it follows that the mind is more or less liable to be acted upon, in proportion as it possesses inadequate ideas, and, contrariwise, is more or less active in proportion as it possesses adequate ideas. PROP. II. Body cannot determine mind to think, neither can mind determine body to motion or rest or any state different from these, if such there be.","label":"Ethics"},{"n":3,"work":"Ethics","page":"","canonical":"","quote":"Proof.--This proposition is evident from Part i., Ax. iv. For the idea of everything that is caused depends on a knowledge of the cause, whereof it is an effect.","label":"Ethics"},{"n":4,"work":"Ethics","page":"","canonical":"","quote":"Therefore the idea of God, wherefrom an infinite number of things follow in infinite ways, can only be one. Q.E.D. PROP. V.","label":"Ethics"}],"answer":null,"siblings":[{"slug":"substance-monism-deus-sive-natura","label":"Substance monism / Deus sive Natura: is there one and only one substance, of which all finite things are modes, or do the definitions admit a plurality of substances and finite created things in their own right?"},{"slug":"necessitarianism","label":"Necessitarianism: does everything that exists exist by absolute necessity, with contingency a mere illusion of finite intellects, or does the system leave room for genuine contingency in nature?"},{"slug":"the-conatus-doctrine","label":"The conatus doctrine: does each thing strive to persevere in its being, with this striving the actual essence of the thing, or are the alleged counterexamples of self-destruction fatal to the doctrine?"}]}