Ask Jack Dorsey, the co-founder of the social network Twitter and the mobile-payment start-up Square, what his two companies have in common, and he has a quick answer: “They’re both utilities.” Mark Zuckerberg might agree: he spent years trying to convince people that Facebook is not a social network but a “social utility.”  It’s an intriguing choice of words for such of-the-moment entrepreneurs. Utilities tend to be boring, slow-growing beasts. They also—and this is the more important point—tend to be monopolies that are either regulated heavily by governments or owned outright by them.  Article