Time was, a war of words between a food writer and an organic-foods retailer would have attracted the interest of maybe seven people in your local food co-op–a bit of chatter over the brown-rice bin and everyone would move on. Those of us in a Safeway with our Perdue roasters and our broccoli avec a hint of pesticide would not have known that an argument took place. But the recent exchanges between Michael Pollan, author of the 2006 bestseller The Omnivore’s Dilemma: A Natural History of Four Meals, and John Mackey, the CEO of Whole Foods, are, if not squarely in the mainstream, awfully close to it.

Thanks to his perch as The New York Times Magazine’s resident food sage, Pollan is a well-known champion of the ethical superiority of small, local organic farms, and of the superior taste of their products. Whole Foods, of course, is a bringer of organic food to grateful yuppies across the country. In The Omnivore’s Dilemma, Pollan describes Whole Foods as the embodiment of “Industrial Organic.” The company’s appetite for product has driven some organic farmers to scale up and become very much like the farms they were supposed to replace: organic dairies now house thousands of cows who have never munched on a patch of grass, while Brobdignagian vegetable farms ship their produce across the country, undercutting small, local farmers. Whole Foods even sells “organic” TV dinners (Pollan says one he tried “looked and tasted very much like airline food”) and, during the North American winter, has asparagus shipped north from Argentina. This would be environmentally dubious on its face, Pollan suggests, given the fuel required to ship the vegetable. In any case, it “tasted like damp cardboard.”

Mackey immediately fired back. In an open letter on the Whole Foods Web site,...

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