After the apocalypse, things seem pretty status quo up in Mendocino County, where a handful of entitled young Stanford alums congregate off the grid to reinforce the tensions between their unsubtlely delineated social types. Crunchies (Kerry Bishé, Adrian Grenier) are to the left and yuppies (Caroline Dhavernas, Ben McKenzie) to the right; with rebel-activist (Mark Webber) and too-young girlfriend (Remy Nozik) not deigning to take sides at all; loner token black guy (Kid Cudi) in the background; and, why not?, a Revolutionary War re-enactor, recently the star of a YouTubed sex video with her congressman boss, right smack in the middle. Thankfully she is played by Gaby Hoffman, with lightness but just enough gravity to hold the group together. And although their reunion is predicated on an act of cyberterrorism which began with more than a million cell phones getting simultaneous spam texts, Goodbye World is not an action movie. Possibly it was intended as a political-action movie. Director Denis Hennelly, who co-wrote with Sarah Adina Smith, achieves an unfortunate imbalance of breezy banter and airless melodrama: The film gets maudlin and actorly, then ties up its plot with a tidiness that seems craven, or at least disproportionate to the baseline of chaos established by its premise. It's all very handsomely and unimaginatively photographed.