"A dull-witted right-wing conspiracy theorist might get stuck at the level of mere specifics and come to the facile conclusion that the people responsible for such-and-such wrongdoing must also be responsible for all wrong-doing, everywhere and throughout history. But anyone endowed with the powers of reason will understand that this is not the case and that there is also a bigger picture. As Ramsay says, there is a difference between “theories about conspiracies” and an all-embracing “Conspiracy Theory” which seeks to explain everything in one neat little package, at the expense of any deeper understanding."
January 1, 1970
https://en.wikiquote.org/wiki/Conspiracy_theories