The essential ingredients of our propaganda model, or set of news “filters,” fall under the following headings: (1) the size, concentrated ownership, owner wealth, and profit orientation of the dominant mass-media firms; (2) advertising as the primary income source of the mass media; (3) the reliance of the media on information provided by government, business, and “experts” funded and approved by these primary sources and agents of power; (4) “flak” as a means of disciplining the media; and (5) “anticommunism” as a national religion and control mechanism. The raw material of news must pass through successive filters, leaving only the cleansed residue fit to print.

— In our words · Source: Manufacturing Consent (Noam Chomsky & Edward S. Herman)