I have to admit up front to liking every single, John Carpenter movie. They are works of art in there unique style and quality. This is actually my favorite of all of them. There could be a criticism that this movie is didactic and sends some sort of clumsy political or philosophical message but I'd have to reply that you simply don't get it. Unlike the modern propensity for movies to try to hammer home some political point or perspective, the message here is only window dressing. The message may (or may not) be important but instead of getting caught up in some sort of self-important moral... read the rest.
Nada, a down-on-his-luck construction worker, discovers a pair of special sunglasses. Wearing them, he is able to see the world as it really is: people being bombarded by media and government with messages like "Stay Asleep", "No Imagination", "Submit to Authority". Even scarier is that he is able to see that some usually normal-looking people are in fact ugly aliens in charge of the massive campaign to keep humans subdued.
Who are they? And what do they want?
George Buck Flower