This is one of those films that will resonate within you long after you've seen it. The landscapes of Scotland and Kenya are only just eclipsed by the superb performances by the actors involved. For me, the most interesting aspect was the fact that there were three tribes, all in varying stages of the evolutionary process. The protagonist tribe are in possession of a fire yet lack the skills to make one from scratch. A tribe of ape-men jealous of said fire steal it and then there is the tribe who excel both in terms of intelligence and crucially the ability to create fire. This is a must-see film.