Materialists

Materialism is a form of philosophical monism which holds matter to be the fundamental substance in nature, and all things, including mental states and consciousness, are results of material interactions. According to philosophical materialism, mind and consciousness are by-products or epiphenomena of material processes (such as the biochemistry of the human brain and nervous system), without which they cannot exist. This concept directly contrasts with idealism, where mind and consciousness are first-order realities to which matter is dependent while material interactions are secondary.

Materialism is closely related to physicalism—the view that all that exists is ultimately physical. Philosophical physicalism has evolved from materialism with the theories of the physical sciences to incorporate more sophisticated notions of physicality than mere ordinary matter (e.g. spacetime, physical energies and forces, and dark matter). Thus, the term ''physicalism'' is preferred over ''materialism'' by some, while others use the terms as if they were synonymous.

Philosophies traditionally opposed or largely historically unreconciled to the scientific theories of materialism or physicalism include idealism, pluralism, dualism, panpsychism, and other forms of monism.

From classical antiquity, Epicureanism is an ancient philosophy of materialism as a major forerunner to modern science. Epicurus, although ostensibly a deist, affirmed both the literal existence of the Greek gods in either some type of celestial "heaven" cognate from which they ruled the Universe (if not on a literal Mount Olympus) and his philosophy promulgated atomism, while Platonism taught roughly the opposite, despite Plato's teaching of Zeus as God.

Overview

Materialism belongs to the class of monist ontology, and is thus different from ontological theories based on dualism or pluralism. For singular explanations of the phenomenal reality, materialism would be in contrast to idealism, neutral monism, and spiritualism. It can also contrast with phenomenalism, vitalism, and dual-aspect monism. Its materiality can, in some ways, be linked to the concept of determinism, as espoused by Enlightenment thinkers.

Despite the large number of philosophical schools and subtle nuances between many,. . (Originally published in 8 volumes.). . all philosophies are said to fall into one of two primary categories, defined in contrast to each other: ''idealism'' and ''materialism''. The basic proposition of these two categories pertains to the nature of reality—the primary distinction between them is the way they answer two fundamental questions: what reality consists of, and how it originated. To idealists, spirit or mind or the objects of mind (''ideas'') are primary, and matter secondary. To materialists, matter is primary, and mind or spirit or ideas are secondary—the product of matter acting upon matter.

The materialist view is perhaps best understood in its opposition to the doctrines of immaterial substance applied to the mind historically by René Descartes; however, by itself materialism says nothing about how material substance should be characterized. In practice, it is frequently assimilated to one variety of physicalism or another.

Modern philosophical materialists extend the definition of other scientifically observable entities such as energy, forces and the curvature of space; however, philosophers such as Mary Midgley suggest that the concept of "matter" is elusive and poorly defined.

During the 19th century, Karl Marx and Friedrich Engels