I'm proud to say I share the same birth year with George A. Romero's Night of the Living Dead. It's a classic that I love watching year after year--mostly because it's one of two movies that still scare the bejeezus out of me (the second being The Exorcist). What could be more frightening than going to a graveyard and getting grabbed by the undead--only to find out the whole world's been turned upside down and there's thousands of them out there that want to eat those still alive? Being stuck in a house surrounded by zombies, that's what...and Romero's film delivers the suspense and crazy-by-the-thousands-zombie-walkers masterfully.
If you love the film as much as I do, I suggest you check out these articles pulled together by PopMatters from various writers who take its theme, its living and its dead characters and compare them to humanity. We are all relatively rational people living with many irrational fears--and Night of the Living Dead preys upon those fears, which makes it a perfect horror film.