Smart, gripping, and untainted by the influence of Michael Moore, this muckraking 2008 documentary transcends anticorporate demonology to build a visceral but reasoned case against modern agribusiness. Director Robert Kenner and bestselling authors Eric Schlosser (Fast Food Nation) and Michael Pollan (The Omnivore’s Dilemma) connect the dots between federal corn subsidies, unprecedented levels of corporate conglomeration, degradation of the food supply, and pandemic obesity, diabetes, and food-borne illness. Even libertarians indifferent to environmental, labor, and animal-welfare issues should bristle at how bullying multinationals have reduced farmers to peonage and nullified the First Amendment with “veggie libel laws” that inhibit honest criticism of their practices. Though the segment on organic alternatives seems thin and naive, you can’t leave this film without a new awareness of what’s on the end of your fork. PG, 94 min.