The most obvious difference between Roman Polanski’s Carnage (which is currently playing around town) and the Yasmina Reza play it’s based on, God of Carnage, is that the title is two words shorter. I wouldn’t be surprised if this change had been made for practical reasons: casual moviegoers might have mistaken something called “God of Carnage” for a Clash of the Titans knockoff or a horror flick. Still, the difference is significant enough to suggest that Carnage is a Polanski film and not simply a piece of filmed theater, as many reviews have characterized it.