The most striking thing about Carnage, Roman Polanski’s adaptation of Yazmin Reza’s stiff but satisfying stage play God of Carnage, is how much funnier it is than its source material. Polanski, who co-adapted the film’s screenplay with Reza, emphasizes the absurd nature of Reza’s blackly comic moral play. His leavening of God of Carnage’s bleak sense of humor is apparent just from the way that he replaced loutish but menacing James Gandolfini with patently non-threatening John C. Reilly in the role of Michael, one of God of Carnage’s four main characters. In Polanski’s hands, what was once a brooding Pinter-esque update of Who’s Afraid of Virginia Woolf? is now more like a broad comedy. Except instead of sitcom-style humor you get jokes indiscriminately lobbed at the expense of four ethically bankrupt petit bourgeois know-nothings. And these are the film’s only protagonists!