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Relation to the world· Mind and consciousness

Materialism

Axis: Nature of realityWhat is reality made of: matter, mind, or both?

Everything that exists is material, including thought, which is merely a product of how matter is organized. Mind is not a separate substance: it can be fully explained by the body and the brain.

Who holds this position

Movements 4

Epicureanismexplicit

Two sure principles govern the whole physics: nothing comes from nothing and nothing returns to nothing, and the very motion of bodies proves there is void in which they move. From this it follows that there exist only atoms, full and indivisible particles, and the void that separates them: everything else, qualities, souls, gods, is but a transient arrangement of these grains. The stake is not speculative but liberating: if the soul itself is an aggregate of atoms that dissolves at death, then the afterlife, judgment and providence collapse at a stroke, and with them the two great fears. This materialism, taken from Democritus but redirected toward happiness, stands squarely against the Stoics' cosmos animated by a and against 's world of Forms.

Epicurus, Letter to Herodotus, 38-44 · Lucretius, On the Nature of Things, book I

Marxismexplicit

The starting point is not an idea but a fact: humans must first produce their means of subsistence before they can think, pray, or legislate. From this Marx "inverts" 's dialectic, in which Spirit unfolded itself in the world: it is not the idea that begets the real, but material activity that begets ideas. Law, religion, and philosophy become superstructures, reflections of the economic base and not first causes. The target is not only but every idealism that believes it can change the world by changing ideas: for Marx, that is to mistake the reflection for the source.

Marx and Engels, The German Ideology (1845-1846) · Engels, Ludwig Feuerbach and the End of Classical German Philosophy (1888)

Stoicismexplicit

Stoic physics is corporealist: only what acts or is acted upon exists, and only bodies can do so. Even the soul and the divine are corporeal, made of a subtle breath, the pneuma. This is a materialism, though one infused with internal reason, which sets Stoicism apart from Platonic idealism.

Diogenes Laertius, Lives, VII, 134-135 · Seneca, Letters to Lucilius, 65

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Taoisminferable

Taoist cosmology resists reduction to Western categories: reality is a continuous flux of qi 氣 (the breath, the energy animating all things), with no sharp break between matter and mind, which places Taoism closer to a monism of materialist coloring than to idealism or dualism. The , the undifferentiated source from which the One, then the Two, then the ten thousand things arise, is neither pure spirit set apart from matter nor an individual mind: everything proceeds from a single energetic ground.

Laozi, Dao De Jing, ch. 42 · Zhuangzi, ch. 22 (Knowledge Wandered North)

Philosophers 5

Epicurusexplicit

All that exists reduces to atoms and void: nothing comes from non-being, nothing dissolves into it, the whole is body and space. The soul itself is made of very fine atoms and dissolves at death. This is a thoroughgoing materialism, inherited from and developed by , with no room for any immaterial reality.

Letter to Herodotus, 39-44 (atoms and void, nothing comes from nothing) · Lucretius, On the Nature of Things, I-II

Lucretiusexplicit

Everything begins from two principles that establishes before all else: nothing comes from nothing, nothing returns to nothing. Were it otherwise, anything could spring from anything, with no seed and no season; yet experience shows fixed natures and ordered cycles, so the real reduces to first bodies, the atoms, and the void that lets them move. Outside this pair nothing exists in itself: soul and mind themselves are aggregates of very fine atoms, and there is no room for any immaterial substance. This thoroughgoing materialism, inherited from and , Lucretius unfolds into a complete system and makes visible, from the speck of dust dancing in a sunbeam to the infinity of worlds.

On the Nature of Things, I, 146-264 (nothing from nothing, nothing to nothing) · On the Nature of Things, I, 418-448 (the all is body and void)

Marxexplicit

To explain an age, one must start not from what it says of itself but from how men produce their material life: it is this reversal of the order of explanation that governs everything. Where made the real subject of history and concrete conditions its mere manifestations, Marx claims to turn the dialectic, standing on its head, the right way up, on its feet: social being, the totality of the relations of production, is the real base of which ideas, law and religion are the superstructure. Yet this materialism is not the contemplative mechanism of earlier materialists, whom he faults precisely for ignoring human activity, hence an overwhelming weight to materialism with a residual share.

Capital, vol. I, afterword to the 2nd edition (the dialectic set on its feet) · The German Ideology, I (the materialist conception of history)

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Nietzscheinferable

The critique of "hinterworlds" and the call to remain faithful to the earth bring everything back to sensuous : the body, forces, this world. Without subscribing to a mechanistic materialism he also mocks, Nietzsche refuses any true world behind the phenomenon, which places him on the side of a this-worldly ontology rather than idealism.

Twilight of the Idols, "How the True World Finally Became a Fable" · Thus Spoke Zarathustra, Prologue, §3

Senecainferable

The Stoic physics Seneca expounds in the Natural Questions is corporealist: only what acts or is acted upon exists, hence only bodies. The active principle itself, the divine reason (), is a material breath (pneuma) diffused through the world, placing his metaphysics on the materialist side, with only a slight surface soul-body dualism.

Natural Questions, II (the corporeal nature of the active principle) · Letters to Lucilius, CVI and CXVII (only bodies exist)

Foundations and implications
This is a root foundation — nothing grounds it further.Materialism — Nature of reality=MaterialismNature of reality
Descriptive
Atheism — Existence of God=AtheismExistence of God
Descriptive
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Hedonism — The highest good!HedonismThe highest good
Prescriptive
The lived body — Being or having a body=The lived bodyBeing or having a body
Descriptive
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Mechanism — Explaining nature=MechanismExplaining nature
Descriptive
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Nothing survives — After death=Nothing survivesAfter death
Descriptive
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Pathocentrism — Moral circle!PathocentrismMoral circle
Prescriptive
Reductionism — Wholes and parts=ReductionismWholes and parts
Descriptive
Reductive physicalism — The enigma of consciousness=ReductivephysicalismThe enigma of consciousness
Descriptive
↓ What it implies

What grounds it

This is a root foundation — nothing grounds it further.

What it implies

Existence of God

If everything that exists is matter in motion, there is no room left for an infinite spiritual substance. Holding materialism thus closes off the ontological space God would occupy, which leads naturally to atheism.

The highest good

If only bodies and their affections exist, with no immortal soul or transcendent end, the good can be measured only by pleasure and the absence of pain. Materialism grounds hedonism: for Epicurus, it is because all is atoms and nothing awaits us after death that a successful life plays out in well-understood pleasure.

Being or having a body

If there is no immaterial soul to inhabit the body, I do not "have" a body the way a pilot has a ship: I am this living organism that perceives, acts and ages. Materialism thus supports the naturalist side of the lived-body thesis, the human being as an animal body shaped by evolution. It does not, however, deliver the "subject" in the sense of Merleau-Ponty's phenomenology, where one's own body is the original locus of all perception and meaning, a content that does not follow from materialism alone.

Explaining nature

A reality made only of matter acts solely through contact and the transfer of motion, with no ends or vital forces. Materialism therefore calls for a mechanistic reading of causality, where every effect is explained by its physical antecedents.

After death

If everything is matter, consciousness comes undone with the body that carries it: materialism grounds annihilation, as in Lucretius, where the soul, made of fine atoms, scatters at death. The link is not absolute: van Inwagen defends a materialist resurrection through divine re-creation.

Moral circle

If the human being is not a soul apart but an animal among animals, no metaphysical boundary radically separates its interests from those of other sentient beings. Materialism supports pathocentrism: what matters morally is not reason but the capacity to suffer, shared with the beasts. Bentham concludes that the real question is "can they suffer?", an argument Singer revives against speciesism.

Wholes and parts

If only matter exists, the properties of wholes must in principle be explained by those of their physical parts. Materialism thereby encourages reductionism, for which the higher level is in principle reducible to the lower.

The enigma of consciousness

If everything that exists is material, consciousness can only be a property of the brain: mental states are physical states that science will eventually identify. Materialism thus leads to reductive physicalism, which denies mind any reality distinct from neural activity.