
But as it happens, I think this relationship is perfect, because it makes them the best illustration of My Ultimate Division of Literature (tm), in which I am very invested these days, since I have exams and deadlines in an unrelated field. So, in the name of escapism and late night coffee rush, I hereby divide the world into narratives that treat the lives of the characters as ends in themselves, and narratives that treat them as means towards something greater. The criterion here is the perspective on what constitutes people's worth. I see two possibilities: (a) life as important by itself, with the characters' actions and choices being what's ultimately at stake and (b) life as a stepping stone that only makes sense in relation with something greater, where the characters' actions and choices are expected to amount to something that transcends them (or to actively fail to do so).
I hold that Roadside Picnic is the first, Stalker, the second. And they are particularly fit to illustrate the distinction, since they both attempt to make a point about human nature through the same device: humanity confronted with an inexplicable and powerful entity (the Zone). Of course, I will spoil both of them in analyzing this, so beware.