Mainstream media (
MSM) is
mass media reflective of prevailing currents of thought, influence, or activity.
[1] It may be contrasted with
alternative media which may contain content discordant with prevailing views.
Large news conglomerates, including
newspapers and
broadcast media, which underwent successive
mergers in the U.S. and elsewhere at an increasing rate beginning in the 1990s, are often referenced by the term. This
concentration of media ownership has raised concerns of a homogenization of viewpoints presented to news consumers. Consequently, the term
mainstream media has been widely used in conversation and the
blogosphere, often in oppositional, pejorative, or dismissive senses, in discussion of the
mass media and
media bias.
According to philosopher
Noam Chomsky, media organizations with an elite audience such as
CBS News and
The New York Times, successful corporations with the assets necessary to engage in original reporting, set the tone for other smaller news organizations which lack resources by creating conversations that cascade down to smaller news organizations using the
Associated Press and other means of
aggregation. An elite mainstream sets the agenda and smaller organizations parrot it.
[1]