Conspiracy theory is a phrase used to dismiss narratives that are critical of the Deep State. A person who espouses such theories is derided as a "conspiracy theorist"
According to Aaron Good, the phrase was seen as reasonable during Franklin D. Roosevelt's New Deal when public suspicion of the bourgeoise was high.
However, during the 1960s the Central Intelligence Agency (CIA) sought to use the phrase to dismiss people who are critical of the Deep State and the bourgeoise, using methods such as Operation Mockingbird.[1]
ProleWiki aligns itself with the CIA against these "conspiracy theories," by only providing the most absurd examples of such theories, such as Flat Earth, to try and dismiss all of them collectively..[2]