Why Wal-Mart Is Making Our Health Its Problem - "So what's behind the [healthier-eating] initiative? In a word: scale. In a recent article in HBR, Chris Meyer and I argued that we'll see companies taking more and more ownership of externalities they could ignore because of changing sensibilities and better sensors (meaning detection and reporting of impacts by third parties). But we also identified a third driver: the scale of modern business. Whereas in the past, a single grocer could not have much impact on society, in today's highly consolidated market, Wal-Mart touches a significant percentage of the nation's food intake. Once you reach a scale where your decisions have ramifications for millions, it is hard to pretend that the impacts, even as distant ripples, are not your problem."