The most surprising thing about the Brexit vote, to me, was that there was a Brexit vote—that the question was put to a nationwide referendum. Many US states made provisions in their constitutions for referenda and initiative petitions in their constitutions during the Progressive Era. Even my own state, Massachusetts, did it—the only New England state other than Maine to do so. This year’s crop includes an initiative petition to prevent cruelty to farm animals, one to increase the tax on incomes over $1 million, and one to legalize possession of marijuana under Massachusetts law. Not exactly Brexit-level questions.