You probably think Lee Harvey Oswald killed JFK by himself...
On that subject, I’m open to alternative possibilities. It’s possible Oswald acted alone.....he was kind of a nut, let’s face it.
On the other hand, reasonable motives have been theorized for other people/organizations to have wanted JFK out of the way.
Would I be surprised or shocked if that were discovered? Not at all. Nor would I would be surprised to find out that a few other prominent assassinations in the 1960s were the handiwork of small cliques of conspirators. Generally, in order for a conspiracy to achieve maximum efficacy, it must be kept relatively small.....a good example is the al-Qaeda conspiracy regarding the September 11th attacks. Or even the rather disturbed fellow in Norway: a conspiracy of one, as far as has been determined thus far. The Reichstag Fire event is the subject of possible conspiracy, as it’s never been conclusively proven that the Nazi’s were behind it (though I’d say logic dictates that they were responsible for it).
So, if there was a conspiracy to assassinate JFK, it was confined to a fairly small handful of people at the most, and done entirely with verbal orders. I don’t imagine someday someone’s going to find a note at CIA headquarters up in Langley saying, “.....and don’t forget to bring back some ribs on your way home from Dallas.”