An inspiring thought, but was it Starbucks or the wave that did it? (see http://news.ycombinator.com/item?id=956570 http://news.ycombinator.com/item?id=956570)

An inspiring thought, but was it Starbucks or the wave that did it? (see http://news.ycombinator.com/item?id=956570 http://news.ycombinator.com/item?id=956570) I'm not (just) being provocative. I'm not even sure how you'd go about determining what caused the "Starbucks revolution", or even that it's possible to be certain about historical causation (as some history academics have suggested).