Materialism (Philosophical)

Time, for philosophical materialism, is the physical dimension within which material processes unfold — the time of clocks, light cones, and thermodynamic irreversibility, not a separate mental or spiritual category. Whatever the best physics says about time is what materialism is prepared to accept, from Newtonian absolute time to the four-dimensional manifold of relativity. The infinite extent of matter on the materialist picture is matched by an indefinitely extended temporal field within which material configurations succeed one another. Time is neither created nor presided over by anything beyond the material order.

Space, for the materialist, is the extended physical medium in which bodies are located and interact — again whatever the best physics describes, from Newton's absolute space to the geometric manifolds of general relativity. Materialism takes no distinctive stand on the metaphysics of geometry beyond following the sciences, but it is committed to the substantival reality of the spatial order against idealist reductions to mind-dependence. There is genuinely something there, extended and structured, within which material bodies are arranged. Space is not a feature of consciousness but of the world consciousness inhabits.

Matter is the fundamental substance of reality. Mind, meaning, and value either reduce to, supervene on, or are eliminable in favour of material organisation.

The materialist treats the observer as an embodied physical system — a brain in a body in an environment — whose perception, cognition, and agency are realised by, and explicable in terms of, the material processes that constitute it. There is no soul, no immaterial mind, no supernatural agency standing behind experience; subjective life is either reducible to neural and behavioural organisation (in the reductive version) or supervenient on it (in the non-reductive version). The classical tradition from Hobbes's 'Leviathan' through La Mettrie's 'L'Homme Machine' to contemporary physicalism shares this commitment. Knowing the observer is, in principle, a job for the natural sciences.

Energy, for materialism, is a real physical quantity, conserved within closed systems and convertible between forms according to the laws the natural sciences have established. The materialist treats the energy of contemporary physics — kinetic, potential, electromagnetic, mass-equivalent, dark — as ontologically on a par with matter itself, indeed as one of the basic features of the physical world without which the very category of matter would be inarticulate. There is nothing behind energy and no further metaphysical category that grounds it; it is part of the irreducible furniture of nature.

Information, for the materialist, is a real but derivative phenomenon: a feature of physical configurations and their causal relations rather than an autonomous metaphysical category. Whatever counts as information — bits, neural patterns, DNA sequences, semantic content — must ultimately be realisable in physical structures and analysable in physical terms. The materialist resists both the idealist tendency to make information primary over matter (as in some it-from-bit programmes) and the dualist tendency to treat meaning as essentially non-physical. Information supervenes on, and is conserved or destroyed along with, the material patterns that bear it.