Classical element

Did You Know?

• In traditional Bakongo religion, the five elements are incorporated into the Kongo cosmogram, with aether representing mbûngi, the circular void that begot the universe.
• In traditional Bambara spirituality, the Supreme God created four additional essences of himself during creation, and together these five essences correlate with the five classical elements.

Hellenistic philosophy

The ancient Greek concept of four basic elements—earth (γῆ gê), water (ὕδωρ hýdōr), air (ἀήρ aḗr), and fire (πῦρ pŷr)—dates from pre-Socratic times and persisted through the Middle Ages into the early modern period. Empedocles (c. 450 BC) was the first to propose these four as a set, calling them the four 'roots' (ῥιζώματα, rhizōmata). He demonstrated that air was a separate substance by inverting a bucket in water and observing that a pocket of air remained trapped inside.

Plato appears to have been the first to use the term 'element' (στοιχεῖον, stoicheîon) for air, fire, earth, and water; the word originally meant 'smallest division (of a sun-dial), a syllable' or a letter as the smallest unit forming a word. In On the Heavens (c. 350 BC), Aristotle provided a general definition of 'element', and in On Generation and Corruption he related each element to two of four sensible qualities: fire is both hot and dry, air is both hot and wet (like vapour), water is both cold and wet, and earth is both cold and dry.

A classic diagram shows one square inscribed in another, with the corners of one representing the classical elements and the corners of the other representing the properties, where opposite corners are opposites such as hot–cold and dry–wet. Hippocrates (c. 460) associated these elements with the four humours in the human body: yellow bile (fire), black bile (earth), blood (air), and phlegm (water). Medical care focused on helping the patient maintain or return to their natural balanced state.

Robert Boyle's 1661 work The Sceptical Chymist, presented as a dialogue, includes the Aristotelian character Themistius discussing these elements.

Ancient Indian philosophy

In Hindu tradition, particularly within the Vedas and Ayurveda, there is a concept known as the pancha mahabhuta, or five great elements. These are earth, water, fire, air or wind, and space, which is also called aether or void. It is believed that everything in creation, including the human body, is composed of these five elements. When a person dies, the body dissolves back into these elements, helping to maintain nature’s cycle.

Each element is linked to one or more of the five senses and acts as a physical medium for experiencing sensations. Earth, considered the most basic element, is made from all the others and can be perceived by all five senses: hearing, touch, sight, taste, and smell. Water lacks smell but can be heard, felt, seen, and tasted. Fire can be heard, felt, and seen. Air can be heard and felt. Space, or aether, is beyond smell, taste, sight, and touch; it can only be heard.

Buddhism has explored the idea of elements in various ways, with some interpretations still relevant today. In Pali texts, the great elements, or mahabhuta, are often listed as four: earth, water, fire, and air. Early Buddhist teachings used these four elements as a framework for understanding suffering and finding liberation from it. The earliest Buddhist writings describe these primary material elements as solidity, fluidity, temperature, and mobility, which correspond to earth, water, fire, and air.

The Buddha’s instruction on the four elements was meant as a basis for observing real sensations, not as a philosophical system. The four properties are cohesion (water), solidity or inertia (earth), expansion or vibration (air), and heat or energy (fire). He taught that mind and matter are made up of eight types of kalapas. The four elements are primary, while a secondary group of four—colour, smell, taste, and nutriment—are derived from them.

Post-classical history

The medieval alchemical system of elements was largely shaped by anonymous Arabic writers working under the name of Pseudo Apollonius of Tyana. Their framework included the four classical elements—air, earth, fire, and water—alongside a new idea: the sulphur-mercury theory of metals. In this theory, sulphur represented the principle of combustibility, described as "the stone which burns," while mercury stood for the principle of metallic properties.

Early alchemists viewed these as idealized, fundamental components of the universe, a concept that held significant weight in philosophical alchemy. Later, the Swiss alchemist Paracelsus expanded this into the tria prima: three metallic principles. Sulphur governed flammability or combustion, mercury governed volatility and stability, and salt governed solidity. Paracelsus argued that Aristotle's four elements appeared in physical bodies as these three principles, using the example of burning wood.

When wood burns, the cohesive principle (mercury) leaves as smoke, causing the wood to fall apart; the smoke itself shows volatility (the mercurial principle), the flames show flammability (sulphur), and the leftover ash shows solidity (salt). In Chinese tradition, the set of elements is known as the wuxing, or "five phases": Metal (Gold), Wood, Water, Fire, and Earth (Soil). These are connected to concepts like Taiji, Yinyang, the Four Symbols, Bagua, Hexagram, and the I Ching.

Each phase has associations: Gold (West) with young yin, autumn, white, the White Tiger, and the Taotie creature; Wood (East) with young yang, spring, blue, the Azure Dragon, and the Feilian creature; Water (North) with old yin, winter, black, and the Black Turtle-Snake; Fire (South) with old yang, summer, red, and the Vermilion Bird; and Soil (Center) with Qi, an intermediate season, yellow, the Yellow Dragon, and the Hundun creature. Japanese traditions use the godai, or "five great" elements: earth, water, fire, wind/air, and void.

These originated from Indian Vastu shastra philosophy and Buddhist beliefs. The Chinese wuxing also remained influential in Japan, particularly among Neo-Confucianists during the medieval Edo period.

Modern history

The classical elements from Aristotle and medieval alchemy paved the way for modern chemistry, scientific theories, and new classification systems. By Antoine Lavoisier's era, a list of chemical elements no longer included the classical ones. Today, some scientists draw a comparison between these ancient elements and the four states of matter: solid, liquid, gas, and weakly ionized plasma. Modern physics also distinguishes between elementary particles, which have no internal structure, and composite particles, which are made of other particles.

In Western astrology, the four classical elements are tied to astrological charts and horoscopes. The twelve zodiac signs are grouped accordingly: Fire signs are Aries, Leo, and Sagittarius; Earth signs are Taurus, Virgo, and Capricorn; Air signs are Gemini, Libra, and Aquarius; and Water signs are Cancer, Scorpio, and Pisces. Historian of science Eduard Jan Dijksterhuis argued that the classical element theory was destined to have a damaging influence.

Bertrand Russell observed that Aristotle's ideas later gained nearly biblical authority, so that from the early seventeenth century onward, nearly every major intellectual advance required an attack on some Aristotelian doctrine.