Hegel argued that form and content are dialectically related, meaning that they mutually determine and shape each other.

Formalist criticism emphasizes the intrinsic qualities of the artwork, such as its composition, color, and texture, rather than its subject matter or external context.

Greenberg argues that abstract art is superior to representational art because it focuses on the essential qualities of painting, such as line, color, and shape.

Cubism, pioneered by Pablo Picasso and Georges Braque, deconstructed objects into geometric forms, challenging traditional notions of representation and emphasizing the autonomy of the artwork.

Formalism is an aesthetic theory that emphasizes the importance of the formal qualities of an artwork, such as its composition, color, and texture, rather than its subject matter or representational content.

Nietzsche believed that art is a form of self-expression and that the form of an artwork reveals the artist's inner state and perspective.

Contextualism is an aesthetic theory that emphasizes the importance of the historical, social, and cultural context in which an artwork is created and interpreted.

Pop Art, pioneered by artists such as Andy Warhol and Roy Lichtenstein, incorporated elements of popular culture, advertising, and consumerism into their artworks, challenging traditional notions of high art and low art.

Subjectivism is an aesthetic theory that emphasizes the importance of the viewer's own subjective experience and interpretation in determining the meaning of an artwork.

Plato believed that the forms of art are imitations of the eternal and unchanging forms that exist in the realm of ideas.

Intertextuality is a literary and artistic theory that emphasizes the interconnectedness of texts and artworks, and the ways in which they reference and allude to each other.

Dadaism, pioneered by artists such as Marcel Duchamp and Hannah Höch, rejected traditional notions of art and aesthetics, and often employed chance operations and found objects in their artworks.

Biographical criticism is an approach to art criticism that emphasizes the importance of the artist's own life and experiences in understanding the meaning of their artworks.

Coleridge believed that the imagination is the primary faculty responsible for the creation of art, and that the form of an artwork is a product of the artist's unique imaginative vision.