Philosophy of motion is a branch of philosophy concerned with exploring questions on the existence and nature of motion. The central questions of this study concern the

epistemology Epistemology (; ), or the theory of knowledge, is the branch of philosophy concerned with knowledge. Epistemology is considered a major subfield of philosophy, along with other major subfields such as ethics, logic, and metaphysics. Epis ...

and

ontology In metaphysics, ontology is the philosophical study of being, as well as related concepts such as existence, becoming, and reality. Ontology addresses questions like how entities are grouped into categories and which of these entities exi ...

of motion, whether motion exists as we perceive it, what is it, and, if it exists, how does it occur. The philosophy of motion is important in the study of theories of change in natural systems and is closely connected to studies of space and time in philosophy. The philosophy of motion was of central concern to Ancient Greek and Roman philosophers, particularly the

pre-Socratic Pre-Socratic philosophy, also known as early Greek philosophy, is ancient Greek philosophy before Socrates. Pre-Socratic philosophers were mostly interested in cosmology, the beginning and the substance of the universe, but the inquiries of thes ...

philosophers such as Parmenides,

Zeno of Elea Zeno of Elea (; grc, Ζήνων ὁ Ἐλεᾱ́της; ) was a pre-Socratic Greek philosopher of Magna Graecia and a member of the Eleatic School founded by Parmenides. Aristotle called him the inventor of the dialectic. He is best known ...

Heraclitus Heraclitus of Ephesus (; grc-gre, Ἡράκλειτος , "Glory of Hera"; ) was an ancient Greek pre-Socratic philosopher from the city of Ephesus, which was then part of the Persian Empire. Little is known of Heraclitus's life. He wrot ...

and

Democritus Democritus (; el, Δημόκριτος, ''Dēmókritos'', meaning "chosen of the people"; – ) was an Ancient Greek pre-Socratic philosopher from Abdera, primarily remembered today for his formulation of an atomic theory of the universe. No ...

. As such, it was influential in the development of the philosophy of science in general.

Early history

Greek physiology

The concept of motion is closely related to the idea of change, and it is arguments about what made change possible that led the early Greek philosophers to pioneer naturalistic explanations for phenomena.

(born circa 535 BC) had famously declared that "all things are in motion like a stream".

Motion only a perception

Parmenides (born circa 475 BC) and his followers held that motion is only perceived but cannot actually exist. He professed that from our human point of view there are two aspects to the study of the universe of which we must be aware, on the one hand how we see it, and on the other how it must really be. Motion is a fact from our point of view, but Parmenides argues that as far as things must really be, it is logically impossible that motion could exist as we perceive it.

, a pupil of Parmenides, formulated the Arguments against motion, more commonly referred to as the

paradoxes A paradox is a logically self-contradictory statement or a statement that runs contrary to one's expectation. It is a statement that, despite apparently valid reasoning from true premises, leads to a seemingly self-contradictory or a logically u ...

, in order to support his masters theories of the One and of the consequent impossibility of motion at the fundamental level. The rigorous denial of even the possibility of motion forced a more thorough response from philosophers engaged on the same theoretical project. This school of thought leaned on the notion of infinite continuous matter, space (and time).

Atomism and determinism

In response to Parmenides definition of motion,

(born circa 460) expounded the

atomic theory Atomic theory is the scientific theory that matter is composed of particles called atoms. Atomic theory traces its origins to an ancient philosophical tradition known as atomism. According to this idea, if one were to take a lump of matter ...

, in which indivisible bits of matter are in constant motion through the void. In the absence of something to perturb them they fall evenly through space. According to this school of thought matter and or space (and time) are discrete and finite. Evidence for this theory was found by John Dalton in the early 1800s, explaining the finding that chemical decomposition of compounds gives whole numbered ratios of weight, leading to

Dalton's atomic theory John Dalton (; 5 or 6 September 1766 – 27 July 1844) was an English chemist, physicist and meteorologist. He is best known for introducing the atomic theory into chemistry, and for his research into colour blindness, which he had. Colour b ...

Motion conceived in this way led to the approach of determinism and therefore to questioning how

free will Free will is the capacity of agents to choose between different possible courses of action unimpeded. Free will is closely linked to the concepts of moral responsibility, praise, culpability, sin, and other judgements which apply only to ac ...

could exist. In response, Epicurus appears to have included the concept of the

clinamen Clinamen (; plural ''clinamina'', derived from ''clīnāre'', to incline) is the Latin name Lucretius gave to the unpredictable swerve of atoms, in order to defend the atomistic doctrine of Epicurus. In modern English it has come more generally t ...

, or atomic swerve. This tiny random motion serves to bring atoms into contact and begin the cascade that leads to the organization of matter as it is perceived by us, introducing an element of uncertainty allowing for the existence of individual choice, an essential concept in Epicure's philosophy.

Plato and Aristotle

According to

Plato Plato ( ; grc-gre, Πλάτων ; 428/427 or 424/423 – 348/347 BC) was a Greek philosopher born in Athens during the Classical period in Ancient Greece. He founded the Platonist school of thought and the Academy, the first institution ...

(circa 425 BC), motion is a phenomenon that can never be completely comprehended or described. It originates in infinite and continuous "spiritual" self-motion which is synonymous to life and to the soul. This perpetual motion causes "communicated" motion, which is the perceived motion of bodies.The systems of Plato and Aristotle Compared as to their Contributions to Physics
Jules Vulemin, part of The

University of Western Ontario The University of Western Ontario (UWO), also known as Western University or Western, is a public research university in London, Ontario, Canada. The main campus is located on of land, surrounded by residential neighbourhoods and the Thames R ...

Series in Philosophy of Science book series (WONS, volume 49)

Aristotle Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of ph ...

(384 BC) claimed that all motion is caused, and can be sensed, but originally was potentially present in the now moving body. Once there is motion, that motion will continue infinitely unless it is stopped. Aristotle's doctrine was generally adopted by medieval science and lead to

Isaac Newton Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, physicist, astronomer, alchemist, theologian, and author (described in his time as a " natural philosopher"), widely recognised as one of the grea ...

's formulation of the

Newton's laws of motion Newton's laws of motion are three basic laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it. These laws can be paraphrased as follows: # A body remains at rest, or in moti ...

in 1666.

Buddhist

The philosophy of motion is treated by the

Buddhist Buddhism ( , ), also known as Buddha Dharma and Dharmavinaya (), is an Indian religion or philosophical tradition based on teachings attributed to the Buddha. It originated in northern India as a -movement in the 5th century BCE, and ...

philosopher

Nagarjuna Nāgārjuna . 150 – c. 250 CE (disputed)was an Indian Mahāyāna Buddhist thinker, scholar-saint and philosopher. He is widely considered one of the most important Buddhist philosophers.Garfield, Jay L. (1995), ''The Fundamental Wisdom of ...

in his treatise the

Mūlamadhyamakakārikā The ''Mūlamadhyamakakārikā'' ( sa, मूलमध्यमककारिका, ''Root Verses on the Middle Way''), abbreviated as ''MMK'', is the foundational text of the Madhyamaka school of Mahāyāna Buddhist philosophy. It was compose ...

or Fundamental verses of the Middle Way, in the 2nd and 3rd century CE. Further east, in China, the Sanlun school of

Mahayana ''Mahāyāna'' (; "Great Vehicle") is a term for a broad group of Buddhist traditions, texts, philosophies, and practices. Mahāyāna Buddhism developed in India (c. 1st century BCE onwards) and is considered one of the three main existing br ...

Buddhism developed a sophisticated philosophy of motion under the philosopher

Sengzhao Sengzhao (or Seng-Chao) (; ja, 僧肇, ''Sōjō''; 384–414) was a Chinese Buddhist philosopher from Later Qin. Born to a poor family in Jingzhao, he acquired literary skills, apparently including the capacity to read Pali, and became a scribe ...

. His treatise called The Immutability of Things, deals with motion explicitly.

Aztec

Aztec metaphysics gave priority to motion over substance in its cosmological

. In other words, process was seen to be fundamental and objects or substances as ephemeral. Change therefore was naturally conceived of as motion, and this motion was divided into three forms, out of which all change occurs. These were named olin (bouncing, oscillating) malinalli (spinning, twisting, spiralling) and, the most important, nepantla (weaving, intersecting, joining, balancing).

Medieval

Maimonides Musa ibn Maimon (1138–1204), commonly known as Maimonides (); la, Moses Maimonides and also referred to by the acronym Rambam ( he, רמב״ם), was a Sephardic Jewish philosopher who became one of the most prolific and influential Tora ...

Averroes Ibn Rushd ( ar, ; full name in ; 14 April 112611 December 1198), often Latinized as Averroes ( ), was an Andalusian polymath and jurist who wrote about many subjects, including philosophy, theology, medicine, astronomy, physics, psy ...

Thomas Aquinas Thomas Aquinas, OP (; it, Tommaso d'Aquino, lit=Thomas of Aquino; 1225 – 7 March 1274) was an Italian Dominican friar and priest who was an influential philosopher, theologian and jurist in the tradition of scholasticism; he is known wit ...

Modern

Achieving a coherent understanding of motion has been, and continues to be, of importance in understanding the nature of space and time in modern science. The main philosophical debate has been between absolute and relational conceptions of motion. * Descartes *

Leibniz Gottfried Wilhelm (von) Leibniz . ( – 14 November 1716) was a German polymath active as a mathematician, philosopher, scientist and diplomat. He is one of the most prominent figures in both the history of philosophy and the history of ma ...

* Newton * Mach * Einstein * Chaos theory * Astronomy

Biology

Motion in complex systems such as protein folding.

Evolution

Morphogenesis of animal bodies and change on large and small scales. Niche construction.

Quantum physics

Questions of the nature of motion continue to arise in modern physics, with many of the issues of concern to early thinkers arising in different form. Heisenberg's uncertainty principle and the clinamen of the Epicureans.

Philosophy of movement

The philosophy of movement is also a subfield of contemporary philosophy related to

process philosophy Process philosophy, also ontology of becoming, or processism, is an approach to philosophy that identifies processes, changes, or shifting relationships as the only true elements of the ordinary, everyday real world. In opposition to the classi ...

and defined by the study of social, aesthetic, scientific, and ontological domains from the perspective of the ''primacy of movement''. This includes philosophers such as Erin Manning and

Thomas Nail Thomas Nail is a Professor of Philosophy at The University of Denver. Biography Nail received a B.A in philosophy from the University of North Texas, and a Ph.D. from the University of Oregon. His dissertation was on the theme of political r ...

References

{{Philosophy of science, Stub Philosophy of science Materialism Process philosophy