A bunch of primitive humans go on a quest for fire. I thought this was pretty unique – most movies that take place in this time period (and there aren’t many) don’t do a really good job… of course, it’s hard to know just what things were like on a day-to-day basis back then. It’s difficult to make a movie with no dialogue (except for the grunting). Though, I’ll have to say that humans of this period probably did have language – it’s a fundamental characteristic of humans.