Deep: On April 9, 1917, a white porcelain urinal was submitted to an open-admission exhibition in New York under the name 'R. Mutt.' The submission committee, which had announced it would accept all entries, rejected it.

The submitter - almost certainly Marcel Duchamp, possibly acting in collaboration - responded by writing a short statement in the journal 'The Blind Man': "Whether Mr Mutt with his own hands made the fountain or not has no importance.

He CHOSE it. He took an ordinary article of life, placed it so that its useful significance disappeared under the new title and point of view - created a new thought for that object." The rejected object, 'Fountain,' became one of the most discussed works in art history without most people ever having seen the original, which disappeared and may have been thrown away.

In a 2004 poll of 500 British art world professionals, it was voted the most influential artwork of the 20th century.

The controversy that 'Fountain' generated - and continues to generate - is not trivial or merely avant-garde provocation. It forced a genuine philosophical question: what makes something a work of art?

If a urinal purchased from a plumbing supply company qualifies, as the subsequent century has substantially agreed it does, then the answer cannot be 'skill in execution,' 'beauty of form,' or 'originality of making.' Something else must be doing the definitional work - and that something else turns out to be surprisingly difficult to specify.

The question is not merely academic: if we cannot say what art is, we cannot say what it is for, why it matters, or what we lose when it deteriorates, disappears, or is misappropriated.

The question of what art is intersects with the question of what beauty is, what aesthetic experience consists in, and what the relationship between art and truth, art and morality, and art and power amounts to. These questions were central to philosophy at least from Plato onward.

They were temporarily declared unanswerable by pragmatist and analytic philosophy, and then forced back onto the agenda by the radical experiments of 20th-century art that made the definitional question unavoidable.

They have become newly urgent in the 21st century, when AI systems can generate visually sophisticated images without human involvement, and when a digital file of questionable ontological status can sell at Christie's for $69 million.

"Art does not reproduce the visible; rather, it makes visible." - Paul Klee, Creative Credo (1920)


Theory of ArtCore ClaimKey Thinkers
Imitation (mimesis)Art represents or imitates realityPlato, Aristotle
Expression theoryArt expresses inner emotionsTolstoy, Croce
FormalismArt is significant form, independent of contentClive Bell, Roger Fry
Institutional theoryArt is what the art world designates as artGeorge Dickie, Arthur Danto
Aesthetic experienceArt produces a distinctive kind of experienceKant, Schopenhauer
Procedural theoryArt defined by how it was made and intendedJerrold Levinson

Key Definitions

Mimesis: The Greek term for imitation or representation - the idea that art imitates or represents the natural world, human action, or experience.

Catharsis: Aristotle's term for the emotional clarification or purgation produced by tragedy - the effect that justified art's existence against Plato's critique.

Aesthetic judgment: Kant's term for judgments about beauty that are neither merely subjective preferences nor objective cognitive claims but a distinctive third kind involving disinterested pleasure and a claim to intersubjective agreement.

Formalism: The theory that art's value resides entirely in its formal properties - arrangement of line, color, shape - independently of subject matter, expression, or context.[5]

Institutional theory: George Dickie's theory that something is art if and only if a person acting on behalf of the artworld confers that status upon it.[8]

The artworld: Arthur Danto's and Dickie's term for the social institution - comprising artists, critics, curators, galleries, collectors, and art schools - that collectively determines what counts as art.

Avant-garde: The advance guard of artistic experimentation, historically associated with movements that deliberately transgressed conventional aesthetic norms.

Readymade: Duchamp's term for a manufactured object selected and designated as art without modification - the paradigm case being 'Fountain' (1917).

Relational aesthetics: Nicolas Bourriaud's term for art that creates social situations and encounters rather than objects - associated with artists including Rirkrit Tiravanija and Carsten Holler.[12]


The Philosophical Foundations: Plato, Aristotle, and the Ancient Debate

Plato's Condemnation

Plato was the first major Western philosopher to engage systematically with art, and his verdict was largely negative. In 'The Republic' (c.

380 BCE), particularly Books III and X, and in 'Ion' and the 'Phaedrus,' Plato argued that the arts - poetry, music, painting - were forms of imitation (mimesis) that stood at a dangerous double remove from reality.[1]

His metaphysics held that the visible world is itself only a pale imitation of the transcendent Forms, the truly real archetypes of which material objects are imperfect copies. Art, which imitates the visible world, is thus an imitation of an imitation - twice removed from truth.

The practical objection was more pointed: art addresses and excites the emotional and irrational parts of the soul at the expense of reason. A well-crafted tragedy makes us weep for fictional suffering, exercising our capacity for pity and fear in ways that may overflow into inappropriate responses to real situations.

Plato's famous decision to banish the poets from his ideal city (while honoring them with garlands) reflected the conviction that art's emotional power was incompatible with the rational self-governance that justice required.

Aristotle's Rehabilitation

Aristotle's 'Poetics' (c. 335 BCE), the surviving portion of what was probably a larger treatise, responded to Plato's critique on multiple fronts.

Aristotle agreed that tragedy involved imitation but argued that mimesis is not a debasement of reality but a natural human capacity and a form of knowledge: we take pleasure in representations because representation engages our capacity for understanding, and we learn what things are by seeing them represented.

Tragedy's imitation of serious human action - of characters making consequential choices in difficult circumstances - illuminates the general patterns of human experience through particular cases, giving us access to what Aristotle called 'the universal' through the particular.

Aristotle's concept of catharsis - the clarification or purgation of pity and fear that tragedy produces - directly contested Plato's worry that art exercises dangerous emotions: catharsis suggests that tragedy does not indulge pity and fear but works them through, leaving the audience in a state of emotional and cognitive clarification rather than disturbance.[2]

The debate about what exactly Aristotle meant by catharsis - whether it is primarily emotional, cognitive, or both - has continued for two millennia without definitive resolution, which is itself testimony to the richness of the concept.


Western Art History: The Major Movements

Renaissance: Perspective and the Mastery of Appearance

The Italian Renaissance (roughly 1400-1600) produced the conception of art as a learned, quasi-scientific discipline aimed at the accurate representation of the visible world.

Filippo Brunelleschi's development of mathematical linear perspective in the 1420s - demonstrated through a famous experiment with a painting of the Florence Baptistery viewed through a peephole - gave painters a systematic method for creating the illusion of three-dimensional space on a flat surface.

Leon Battista Alberti codified the technique in 'Della Pittura' (1435), the first theoretical treatise on painting in the Western tradition.

Leonardo da Vinci, Raphael, and Michelangelo represent the High Renaissance synthesis: mastery of perspective, anatomy (Leonardo's dissections were conducted in the service of pictorial accuracy), narrative composition, and the representation of idealized human beauty as expressions of divine perfection.

Giorgio Vasari's 'Lives of the Artists' (1550, expanded 1568) established the historical narrative of progressive improvement toward a perfection achieved in his own lifetime - a teleological art history that shaped Western thinking about artistic development for centuries.

Baroque and the Drama of Light

The Baroque period (roughly 1600-1750) pushed Renaissance mastery toward extremes of dramatic effect. Caravaggio's chiaroscuro - the violent contrast between intense illumination and deep shadow - produced a dramatically confrontational style that brought sacred subjects into sensory immediacy.

His models were from the streets of Rome, not idealized classical types; his saints bled and grimaced. Rembrandt van Rijn developed chiaroscuro into an instrument of psychological depth, illuminating not just surfaces but inner states.

Gianlorenzo Bernini's sculpture extended the Baroque principle into three dimensions: his 'Ecstasy of Saint Teresa' (1651) captures spiritual transport in marble with a sensory immediacy that deliberately blurs the boundaries of sacred and erotic experience.

Neoclassicism, Romanticism, and the Political Aesthetic

The political upheavals of the late 18th century produced competing aesthetic ideals. Neoclassicism, associated with Jacques-Louis David and inspired by the archaeological discoveries at Pompeii and Herculaneum, championed clarity, order, and civic virtue - the aesthetic of the Roman Republic as model for the French one.

David's 'Oath of the Horatii' (1784) and 'Death of Marat' (1793) placed classical form at the service of revolutionary politics.

Romanticism, in reaction, privileged emotion, imagination, individual genius, and the power of nature over the rational clarity of classicism.

Eugene Delacroix's 'Liberty Leading the People' (1830) placed a mythic female figure at the center of a politically charged scene with an energy and colorism that David's controlled classicism would not have permitted.

J.M.W. Turner's late landscapes dissolved form into light and atmosphere, representing not the world as it objectively is but the overwhelming sensory experience of it.

The Romantic sensibility was explicitly theorized by Kant's account of the sublime - the experience of overwhelming natural power that defeats imagination and reveals the greater power of human reason - and by Friedrich Schiller's aesthetic writings on the education of humanity through beauty.

Impressionism: The Subject Is Perception

When the jury of the Paris Salon rejected Édouard Manet, James McNeill Whistler, and their associates in 1863, Napoleon III authorized a 'Salon des Refusés' (Salon of the Rejected) to exhibit the works anyway.

The work that gave Impressionism its name - Monet's 'Impression, Sunrise' (1872), exhibited at the group's independent exhibition in 1874 - was initially used mockingly by the critic Louis Leroy, who took the title as an admission of incompleteness.

The Impressionists were not attempting incompleteness but a different kind of completeness: the accurate representation of visual experience rather than the accurate representation of objects.

Light reflected from water changes from moment to moment; surfaces dissolve into colored sensation in peripheral vision; the experience of a garden in afternoon light is not the experience of the garden's botanical components.

Impressionist painting captured these perceptual experiences at the cost of the precisely defined contours and local color that academic tradition required.


Modernism and the Avant-Garde

Cubism: Multiple Perspectives

Pablo Picasso's encounter with African and Iberian art at the Trocadéro museum in Paris in 1907, combined with his intensive study of Cézanne's structural decomposition of visual form, produced 'Les Demoiselles d'Avignon' (1907) - widely regarded as the initiating work of Cubism.

The painting represented five female figures using flattened, angular planes, with facial features derived from African and Iberian masks applied to European bodies, and multiple viewpoints simultaneously visible. The unity of the human form as Renaissance anatomy had codified it was shattered.

George Braque and Picasso collaborated closely from 1908 to 1914 in developing Cubism, producing works so similar that they initially refused to sign them. Analytical Cubism (roughly 1908-1912) decomposed objects into facets seen from multiple viewpoints, creating a monochromatic surface of overlapping planes.

Synthetic Cubism (from 1912) reintroduced color and collage, incorporating newspaper clippings, wallpaper, and other found materials into painted surfaces - extending 'Fountain's' eventual logic into painting itself.

Dada and the Readymade

Dada, emerging from Zurich in 1916 and spreading to Paris, Berlin, and New York, was an anti-art movement that used art's institutional apparatus to demolish art's institutional claims.

Disgusted by a European civilization that had produced the industrial slaughter of the Western Front, the Dadaists deployed nonsense, chance, found materials, and deliberate provocation to deny that art was a vehicle for transcendence or truth.

Duchamp's readymades - 'Bottle Rack' (1914), 'In Advance of the Broken Arm' (a snow shovel, 1915), and 'Fountain' (1917) - pushed the logic to its conclusion: if the artist's choice is sufficient to designate something as art, then art's claim to special skill, beauty, or spiritual value is revealed as institutional convention rather than natural fact.

The readymade did not destroy art but transformed its self-understanding. Duchamp's gesture posed a question that art has been answering ever since: if anything can be art, what distinguishes art from non-art? The institutional theory was one answer.

Arthur Danto's theory of the 'artworld' - the claim that artistic status depends on a work's relationship to an ongoing tradition and theoretical framework of interpretation - was another.[9]

Abstract Expressionism and Greenberg's Criticism

The New York School of the 1940s and 1950s - Jackson Pollock, Willem de Kooning, Franz Kline, Mark Rothko, Barnett Newman - produced Abstract Expressionism, the first major art movement in which the United States, rather than Paris, was the center of gravity.

Pollock's drip paintings, made by pouring and dripping paint onto canvases laid on the floor, eliminated the traditional tools and gestures of painting in favor of whole-body action - photographs by Hans Namuth showed Pollock moving around and across the canvas in a kind of choreographed improvisation.

Rothko's large-scale color fields - rectangles of atmospheric color that seemed to glow from within - aimed at an immediate emotional address that bypassed narrative and representation entirely.

Clement Greenberg's formalist criticism provided the theoretical framework: he argued that each medium's development was properly understood as a process of self-definition, in which the medium progressively stripped away conventions borrowed from other arts to arrive at what was specific and essential to itself.[11]

Painting's essential property was flatness - the two-dimensional surface - and the development from Manet through Impressionism to Abstract Expressionism was a progression toward this flat, purely optical experience.

This narrative was influential but ultimately untenable: it excluded too much (sculpture, photography, performance) and was internally undermined by Pop Art's embrace of commercial imagery.


Aesthetic Theory: Kant, Hegel, Tolstoy, and Dewey

Kant's Disinterested Pleasure

Kant's 'Critique of Judgment' (1790) remains the most philosophically developed account of aesthetic experience.[3]

The puzzle Kant addressed was the distinctive logical character of aesthetic judgment: when we say 'this is beautiful' we seem to be making a claim that demands others' agreement (unlike 'I like this'), but we cannot support the claim by argument or evidence (unlike 'this is true').

Kant's solution was to identify aesthetic judgment as grounded in disinterested pleasure - pleasure taken in the appearance of an object independently of any interest in its existence, utility, or moral significance.

When you respond aesthetically to a painting you respond to how it looks, not to what it depicts or what owning it would mean.

This disinterestedness is the condition of possibility for aesthetic judgment's distinctive universality claim: if your pleasure in an object depends on interests specific to you - your desire to own it, your political commitments, your professional expertise - then your judgment reflects those interests rather than the object's aesthetic character.

Only a pleasure freed from all such interests can claim the kind of shared basis that aesthetic judgment's universality implies.

Hegel and the Historical Fate of Art

G.W.F. Hegel's 'Lectures on Aesthetics' (delivered 1818-1829, published posthumously 1835) placed art within an ambitious philosophy of history.[4] For Hegel, art, religion, and philosophy are the three modes through which Geist (Spirit, or Mind) comes to know itself.

Art is the sensuous appearance of the Idea - the Absolute made perceptible in material form. Greek sculpture, for Hegel, achieved the perfect balance between spiritual content and sensuous form: the marble body of a god expressed the divine in exactly the right material.

But art's historical development was a movement toward greater spiritualization that eventually outran sensuous form's capacity to express it, and modern art's task was therefore to point beyond itself toward religion and ultimately philosophy.

Hegel's 'end of art' thesis - the claim that art had in principle completed its historical mission - has been both enormously influential and enormously controversial, since art has continued to develop and innovate for two centuries since he made it.

Tolstoy and Dewey: Art for Everyone

Leo Tolstoy's 'What Is Art?' (1897) rejected most of what was conventionally called art as degenerate, obscure, and serving the pleasures of an idle class rather than the genuine communication of feeling that art should accomplish.

For Tolstoy, art is successful when it infects the receiver with the feeling the artist experienced - when the emotion is genuinely transmitted through the artistic medium.[6] This ruled out most of the art he knew, including most of Wagner, most of Shakespeare, and most of his own earlier novels, which he regarded as insufficiently sincere.

John Dewey's 'Art as Experience' (1934) took the opposite direction: rather than elevating art above ordinary experience, Dewey argued that aesthetic experience is the consummation of ordinary experience - the integration of impulse, feeling, and meaning that all human activity potentially achieves.[7]

A craftsman fully engaged in skilled work, a physician absorbed in diagnosis, a baseball player perfectly in the zone - all of these approach the condition of aesthetic experience that art achieves in its most concentrated form.

Dewey's democratization of aesthetic experience implied a critique of the museum system that isolated 'high' art from everyday life.


Non-Western Art and the Global Artworld

E.H. Gombrich's 'The Story of Art' (1950) - the best-selling art history book ever published, still in print and still widely taught - was candid about its scope: it told the story of Western art from ancient Egypt to mid-20th century Europe and America, with non-Western art appearing primarily as influence on Western modernism.[10]

This limitation was not mere cultural narrowness but reflected the structure of Western art history as a discipline, organized around the narrative of progressive representation and the institutional apparatus of museums, art markets, and universities that had developed in Europe and North America.

The decolonization of art history is an ongoing project. Kehinde Wiley's large-scale portrait paintings - which place Black men and women in the compositional poses of European Old Master portraiture - make the politics of representation unavoidable, using the visual language of Western art history to make visible what that history had systematically excluded.

Ai Weiwei's political art - from 'Sunflower Seeds' (100 million hand-painted porcelain seeds filling Tate Modern's Turbine Hall in 2010) to his documentation of Syrian refugee crisis victims - operates simultaneously within contemporary global art institutions and as a form of political testimony that those institutions cannot entirely contain.

The global art market's expansion has brought new centers into view without necessarily resolving the power asymmetries that structured art history's Eurocentrism.

The Art Basel fairs in Basel, Miami Beach, and Hong Kong, and Christie's and Sotheby's global auction networks, have incorporated artists from previously marginal art worlds into an integrated global market whose prices reflect a combination of aesthetic judgment, speculation, and cultural prestige that is not obviously democratic.


Digital Art, NFTs, and the Question of AI

Beeple and the NFT Moment

The Christie's sale of Beeple's 'Everydays: The First 5000 Days' for $69 million in March 2021 seemed to announce that the decades-old problem of digital art - its infinite reproducibility, which made the concept of an original meaningless - had been solved by blockchain technology.

NFTs (non-fungible tokens) created verifiable, transferable records of ownership that could be applied to digital files. The sale was real; the questions it raised were genuine: what exactly does NFT ownership mean?

The blockchain record is unquestionable, but the file itself can be freely viewed, downloaded, and reproduced by anyone. The 'original' is a social fact about a blockchain entry, not a physical distinction between objects.

The NFT market's rapid collapse in 2022-2023 - trading volumes fell by more than 97 percent from peak - suggested that the 2021 bubble reflected speculative enthusiasm enabled by low interest rates and cryptocurrency wealth more than a genuine revaluation of digital art's cultural position.

The questions about digital art's value, originality, and institutional status remain, stripped of the speculative overlay.

AI Art: Authorship Without an Author

AI image generators trained on billions of human-made images can produce work of striking visual sophistication. The philosophical question - whether these outputs are art - turns on contested premises. If art requires human intentionality and expression, AI outputs are not art.

If art is defined institutionally or by audience response, the question is open.

The practical questions are sharper: the legal status of AI outputs under copyright law is genuinely uncertain in most jurisdictions; the training data question - whether AI systems trained on copyrighted images constitute copyright infringement - is being litigated; the economic impact on human visual artists working in illustration, concept art, and graphic design is already substantial.

Sol LeWitt's 'Paragraphs on Conceptual Art' (1967) argued that in conceptual art the idea itself is the work - the execution is of secondary importance.

If this principle is accepted, an artist who formulates the concept (the text prompt, the selection and iteration of outputs) might be regarded as the genuine artistic agent even when an AI system performs the execution.

Whether this argument is compelling depends on how much weight one places on the skill of making versus the idea behind it - a question art has been arguing about since Duchamp.

See also: What Was the Renaissance?, What Is the Enlightenment?, What Is Globalization?


Sources & Further Reading

  1. Plato. (c. 380 BCE). "The Republic" (Books III and X). Multiple modern editions.
  2. Aristotle. (c. 335 BCE). "Poetics." Multiple modern editions.
  3. Kant, I. (1790). "Critique of Judgment." (W. Pluhar, Trans.). Hackett, 1987.
  4. Hegel, G. W. F. (1835). Lectures on Aesthetics (2 vols.). (T. M. Knox, Trans.). Oxford University Press, 1975.
  5. Bell, C. (1914). Art. Chatto and Windus.
  6. Tolstoy, L. (1897). "What Is Art?" (R. Pevear & L. Volokhonsky, Trans.). Penguin, 1995.
  7. Dewey, J. (1934). "Art as Experience." Minton, Balch and Company.
  8. Dickie, G. (1974). Art and the Aesthetic: An Institutional Analysis. Cornell University Press.
  9. Danto, A. C. (1964). The artworld. Journal of Philosophy, 61(19), 571-584.
  10. Gombrich, E. H. (1950). "The Story of Art." Phaidon.
  11. Greenberg, C. (1960). Modernist painting. Forum Lectures (Voice of America). Reprinted in The Collected Essays and Criticism Vol. 4 (J. O'Brian, Ed.). University of Chicago Press, 1993.
  12. Bourriaud, N. (2002). "Relational Aesthetics." (S. Pleasance & F. Woods, Trans.). Les Presses du Réel. (Original French, 1998.)