The History of TV (1): How the Media Got Liberal

The media has become increasingly liberal since the end of the 1950s in the US. Television became taken over by liberal-minded executives and film directors who infused their liberal politics in their work and who attempt to shut down people with alternative views. The free market argument used by those in the film and media industry to justify the liberalisation of TV, that if you don't want to watch it, don't watch it was a false one. A large proportion of viewers in the US were non-liberals and that media executives collude together to form a monopoly.

Source: Primetime Propanganda: The True Hollywood Story of How the Left Took Over Your TV by Benjamin Shapiro