One of the best bad movies I've ever seen. It's loaded with symbolism, psychology, sex, violence, and as any good sci-fi - it's a warped mirror of our own modern world.
That said, it's a terribly bad movie! Special effects are cheap, the acting is just absolute ham, editing forgot to cut out a good 45 minutes of the movie, cinematography was hit and miss on brilliance (get that nipple in the shot - yea), directing, writing, costumes, and set design all were unabashedly 70's.
I'd imagine, when Sean Connery is on his death bed, he'll think to himself "Wow, Zardoz was a fun movie to make. Really glad I did that one." Cause if I were in his shoes, I would have said yes to that screenplay in less than a heartbeat.
The only reason I'm giving it one less star than it deserves is because it's such a turd of a movie. Go watch it with friends and loved ones!