When did the phrase conspiracy theory first appear in print?
The phrase conspiracy theory first appeared in print on the 11th of January 1863, in a letter to the editor of The New York Times by Charles Astor Bristed. Bristed used the phrase to describe claims that British aristocrats were intentionally weakening the United States during the Civil War to advance their financial interests. At that time, the phrase carried no negative connotation, merely suggesting a plausible postulate of a conspiracy.