Naturalism

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Naturalism is the philosophical position that nature is all there is: that whatever exists belongs to a single natural order, governed by the same kinds of cause and law throughout, with nothing standing outside or above it. There is no separate supernatural realm, no order of being unreachable by inquiry. The word covers a family of related commitments rather than one fixed doctrine, but at the center of all of them is that refusal to grant anything a place beyond nature.

It is useful to separate two strands that often travel together. Metaphysical naturalism is a claim about what exists — that the world is exhausted by natural things and their properties, leaving no room for gods, disembodied souls, or immaterial powers. Methodological naturalism is narrower and more cautious: it holds only that inquiry should proceed as though natural explanations were the ones to seek, without pronouncing on whether anything lies beyond their reach. The two are distinct, and a thinker can hold the method while remaining agnostic about the metaphysics; much of modern science operates on the method alone.

The impulse is old. The atomism of Democritus and the Epicureans tried to account for the world through matter in motion, and Lucretius set that program to verse with the explicit aim of freeing people from fear of the gods. The Stoics spoke of physis, an immanent ordering reason pervading the cosmos rather than ruling it from outside. These were not naturalism in the modern sense — they were dense with the divine — but they shared the move of looking for the world’s workings inside the world. The term itself, and the sharpened opposition between the natural and the supernatural, belongs to the modern period: to the seventeenth-century mechanical philosophy, to the Enlightenment, and above all to the nineteenth and twentieth centuries, when the success of the sciences made naturalism the default frame of much academic philosophy.

Naturalism is best understood by what it sets itself against. It is the position that the larger part of religious, mystical, and esoteric thought rejects, and against which those traditions partly define themselves — for each of them asserts precisely what naturalism denies: an order of reality the senses and the sciences do not reach, and a knowing that arrives from beyond the natural. To read those traditions on their own terms is to take seriously a claim naturalism rules out at the start. That tension is real, and it is not resolved by noticing it. Whether nature is the whole of what there is remains exactly the question the traditions and their critics have always divided over; naturalism is one of the two answers, stated plainly and held without appeal to anything further.

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