Manufacturing Consent is a 1992 feature which looked at one of Noam Chomsky's theories about the way media influences people's lives. This theory is the idea that the things presented to the public by the mainstream media manipulates and influences their thoughts and beliefs.
The theory suggests that big media businesses are an efficient tool for distributing government propaganda, which influences the political thoughts and beliefs of the general public. This use of the mainstream media can persuade people into wanting the country to run in a certain way (or at least believing that they want the country to run in a certain way).
By using the media as a social institution like this, Chomsky suggests that the government could bias the media to sway voting patterns to a particular side.
Whilst Chomsky's theory suggests that the media persuades people towards a particular political belief, it can also be argued that the media can influence the public's way of thinking in other ways, such as about what things are morally right or wrong. This false influence can still be observed in the media today, such as how this gem from Fox News isn't in any way showing a one-sided viewpoint...