The science fiction film genre has long served as useful means of discussing sensitive topical issues without arousing controversy, and it often provides thoughtful social commentary on potential unforeseen future issues. The fictional setting allows for a deeper examination and reflection of the ideas presented, with the perspective of a viewer watching remote events. Most controversial issues in science fiction films tend to fall into two general storylines, Utopian or dystopian. Either a society will become better or worse in the future. Because of controversy, most science fiction films will fall into the dystopian film category rather than the Utopian category.