John J. Reilly was a prolific writer whose work centered on how civilizations interpret their own decline and the "end of the world."

: The fictional, eccentric protagonist of John Kennedy Toole’s Pulitzer Prize-winning novel A Confederacy of Dunces . He is described as a "modern Don Quixote" and is often cited as the literary godfather of the "internet troll" due to his pomposity and social dysfunction.

If you are referring to a different "J. Reilly" involved in writing or media, here are the most prominent figures: