A new, three-minute ad by Coca-Cola, "Small World Machines," starts with a relatively straightforward premise: India and Pakistan do not get along so well. It ends with the promise of peace: "Togetherness, humanity, this is what we all want, more and more exchange," a woman, either Indian or Pakistani, narrates as the music swells. Sounds great. How do we get there? By buying Coke, of course.