Knowra Four elements Four elements The ancient theory that all matter is composed of earth, water, air, and fire. It shaped Greek natural philosophy and later medical and alchemical thought.
Aristotelian physics : Aristotle’s account of nature, motion, matter, and the heavens, organized around qualitative causes and natural places. Aristotle made the four elements a systematic account of terrestrial matter and change.
Pre-Socratic philosophy : Early Greek philosophy before Socrates, marked by natural explanations of the cosmos and its underlying principles. The four-element proposal belongs to this broader search for nature’s basic constituents.
Humorism : An ancient and medieval medical theory that explained health and temperament through balances among bodily fluids. Greek physicians connected the four elements’ qualities to the bodily humors.
Classical elements : Traditional systems that describe the world through a small set of fundamental substances or principles. The Greek four-element theory is one influential member of this wider family.
Empedocles : An ancient Greek philosopher who proposed four enduring roots—earth, water, air, and fire—combined by Love and Strife. His four roots supplied the theory’s earliest surviving formulation.
Thales of Miletus : An early Greek philosopher traditionally credited with identifying water as the fundamental principle of everything. Thales offered one basic substance where Empedocles later proposed four.
Classical element (alchemy) : A basic substance in alchemical systems, often understood through the classical elements or related principles. Alchemists adapted elemental ideas to explain materials and their transformations.
Chemical element : A pure substance defined by atoms with the same number of protons, not decomposable by chemical means. Modern chemistry uses an experimentally grounded meaning of element unlike earth, water, air, and fire.
Hot and cold : Contrary qualities used in ancient natural philosophy to describe and explain physical change. Hot and cold distinguished the elements and helped explain their transformations.
Anaximenes of Miletus : An early Greek philosopher who treated air as the underlying principle from which other things arise through rarefaction and condensation. His single-substance account contrasts with the four elements as irreducible roots.
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