"It's very clear that there are two classes on the train: the bourgeoisie and the proletariat. It isn't direct, but the two classes are very clearly analogous to the bourgeoisie and the proletariat. The system involved at the back of the train seems to be somewhat anarcho-socialist, or maybe a unit or two to the right of that, as they still fight over food, and there's still the drug (Kronole) trade going on. Now the main character (I forget his name, so I'll call him Bob) is sort of like Lenin. He rallies up the proletariat and fights his way and seizes the water production--or so he thinks. So I'd say this is analogous to seizing some means of production, but those means of production are still by some extension controlled by the bourgeoisie, just as the water system is controlled by the bourgeoisie. I'm not sure what the young boy and the kronole-head girl represent though. I think the young boy may represent hope (he was taken away, but he came back and he was the only one other than the girl who survived--so hope lived on to the end). Then came the whole massacre thing with the night vision goggles and whatnot. I think this represents generic proletariat struggle with the bourgeoisie in labor strikes and whatnot. The one guy who's been in contact with the conductor probably represents a union stool. Then there's the whole scene with them getting the tour through the bourg section. I think this represents the proletariat gaining hope, that they're taking their fight directly to the bourgeoisie now. But the bourgeoisie tricks them again and massacres even more of them. The whole classroom scene was immediately seen to represent the pure indoctrination they feed us in our real life classrooms. I think the whole "world frozen over" part is representative of how our world will come to an end if we don't fight for the proletariat. The seven people represent previous but failed proletariat uprisings, which are supposed to discourage new uprisings, but instead gives them hope. The snow melting is representative of how the proletariat is breaking through the bourgeois destruction of the world. Eventually he gets to the head, finds out his senpai was actually a union stool, and then finds out that only 73 people are remaining "Just as planned." The guy takes all the Kronole, which angers the bourgeoisie, and they once again physically fight the proletariat. Another clash of the bourgeoisie and proletariat. They explode the door, but the explosion causes an avalanche which kills everyone but the girl and the boy. So here, neither the bourgeoisie nor proletariat win, but the fact that they saw animals at the end suggests that there is still hope or something like that. The ending was so ambiguous, but because the proletariat failed to save themselves, and instead the bourgies got what they wanted up until the avalanche, which also destroys the proletariat. Perhaps the avalanche represents the crumbling of "the system" which will bring down the bourgs but also the proletariat according to the negative interpretation I'm getting from this. The lighter interpretation is that since the boy in my mind represents hope, hope and whatever the girl represents--perhaps ingenuity--will live on--perhaps there were somehow other survivors and they can help rebuild society.