Snowpiercer

The train is set up like a miniature country, where certain numbers of people are kept in poverty simply to keep the economy and resources in balance; the poor people could be helped, but they aren't. One character learns to be a leader, even though he doesn't necessarily believe in himself at first. And a secondary character thinks outside the box, literally. He dreams of escaping the entire system and starting afresh; the two characters have different solutions to the problem of poverty and repression.

Very brutal and bloody. Guards beat up an old woman and take children away from their parents. Many characters are violently beaten or shot during many assorted fights, brawls, and battles. Some are executed point blank; key characters die, and the overall body count is high. Characters fight with axes, knives, guns, and other weapons. Blood is shown dribbling and spurting. A man's arm is shoved through a hole in the train; after a few minutes, it freezes solid, and the bad guys shatter it. There's a gross-out scene involving some bugs. Children are shown to be brainwashed in a "school" car, and other children are forced to be laborers. Some disturbing dialogue about cannibalism. There's a huge crash.

"F--k" and its various permutations are used a few times, plus "s--t," "a--hole," "bitch," "bastards," "damn," "crap," and English slang like "shite."