'' (1917) by
Marcel Duchamp. (
Alfred Stieglitz) Sociologically, as a stratum of the
intelligentsia of a society, avant-garde artists, writers, architects, et al. produce artefacts – works of art, books, buildings – that
intellectually and ideologically oppose the conformist value system of mainstream society. In the essay "
Avant-Garde and Kitsch" (1939),
Clement Greenberg said that the artistic vanguard opposes
high culture and rejects the artifice of
mass culture, because the avant-garde functionally opposes the
dumbing down of society – be it with
low culture or with high culture. That in a capitalist society each medium of mass communication is a factory producing artworks, and is not a legitimate artistic medium; therefore, the products of mass culture are
kitsch, simulations and simulacra of art. Walter Benjamin in the essay "
The Work of Art in the Age of Mechanical Reproduction" (1939) and Theodor Adorno and Max Horkheimer in
Dialectic of Enlightenment (1947) said that the artifice of
mass culture voids the artistic value (the
aura) of a work of art. That the capitalist
culture industry (publishing, music, radio, cinema, etc.) continually produces artificial culture for mass consumption, which is facilitated by mechanically produced art-products of mediocre quality displacing art of quality workmanship; thus, the profitability of
art-as-commodity determines its artistic value. Noting the conceptual shift, theoreticians, such as
Matei Calinescu in
Five Faces of Modernity: Modernism, Avant-garde, Decadence, Kitsch, Postmodernism (1987), and Hans Bertens in
The Idea of the Postmodern: A History (1995), have said that Western culture entered a
post-modern time when the
modernist ways of thought-and-action and the production of art became redundant in a capitalist economy. Scholars have highlighted the troubling associations of avant-garde movements with
authoritarian politics and right wing movements in Europe like
Nazism and
Fascism. Avant-garde figureheads like the American poet
Ezra Pound,
Wyndham Lewis, and the Italian futurist
F.T Marinetti and their alliances with twentieth century authoritarian politics have sparked controversy. Parting from the claims of Greenberg in the late 1930s and the insights of Poggioli in the early 1960s, in
The De-Definition of Art: Action Art to Pop to Earthworks (1983), the critic
Harold Rosenberg said that since the middle of the 1960s the politically progressive avant-garde ceased being adversaries to artistic commercialism and the mediocrity of
mass culture, which political disconnection transformed being an artist into "a profession, one of whose aspects is the pretense of overthrowing [the profession of being an artist]." Avant-garde is frequently defined in contrast to , which in its original military sense refers to a
rearguard force that protects the advance-guard. The term was less frequently used than
avant-garde in 20th-century art criticism. The art historians Natalie Adamson and Toby Norris argue that
arrière-garde is not reducible to a
kitsch style or
reactionary orientation, but can instead be used to refer to artists who engage with the legacy of the avant-garde while maintaining an awareness that doing so is in some sense anachronistic. The critic
Charles Altieri argues that avant-garde and
arrière-garde are interdependent: "where there is an avant-garde, there must be an
arrière-garde." ==Examples==