Mainstream press

Mainstream media (MSM) is a term and abbreviation used to refer collectively to the various large mass news media that influence a large number of people, and both reflect and shape prevailing currents of thought. The term is used to contrast with alternative media which may contain content with more dissenting thought as they do not reflect prevailing opinion.

The term is often used for large news conglomerates, including newspapers and broadcast media, that underwent successive mergers in many countries. The 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.

The advent of the Internet allowed the expression of a more diverse or alternative viewpoint which may contrast to mainstream media, to the point where the term mainstream media is seen in pejorative terms.

Lamestream media is a common pejorative alternative. Sarah Palin referred to "lamestream media," notably around 2009 during her participation in the Tea Party Express, in the context of what she perceived as media misrepresentation of the Tea Party movement.

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