Adam Gorightly, who promised to explain the Discordian references in Illuminatus! as the online group reading continues, has a very interesting post up at his Historia Discordia website explaining the Discordian backstory behind the first set of Confrontation magazine memos on the Illuminati. This is a read-the-whole-thing post, but here is a taste:
The evolution of much of the Illuminati mythos depicted in Illuminatus! was initially inspired by Jim Garrison’s JFK assassination investigation of all things, which makes all of this even more convoluted, so bear with me .... During the course of Garrison’s investigation, one of his unofficial investigators (otherwise known as the “Irregulars”) was a fellow named Allan Chapman who subscribed to the theory that JFK’s assassination had been orchestrated by (you guessed it!) the Bavarian Illuminati.