conspiracy theories

The term "conspiracy theory" is itself the subject of a conspiracy theory, which posits that the term was popularized by the CIA in order to discredit conspiratorial believers, particularly critics of the Warren Commission, by making them a target of ridicule.[55] In his 2013 book Conspiracy Theory in America, political scientist Lance deHaven-Smith wrote that the term entered everyday language in the United States after 1964, the year in which the Warren Commission published its findings on the Kennedy assassination, with The New York Times running five stories that year using the term.[56]

https://en.m.wikipedia.org/wiki/Conspiracy_theory