So getting back to the OP, I plan on showing SW to a friend who has never watched it. I am making it an interactive experience that goes through the chronology of what it was like before May 77.
So first I will show him the special effects of old space shows and movies (Star Trek [shudder]). Then I will show him what sci-fi films were like in the 70's - propagandistic, survivalist.
Then I will be guiding him through the amount of promotional material, beginning with the Chakin poster, then the trailer, novelization, radio spots, comic book, etc.
He is a Humanities professor so for him never to have seen it is terrible in it of itself, but he should appreciate everything surrounding this piece of art.