Some books are about how one small thing changed the world—the pencil or the toothpick, for example. This is not that kind of book. Instead, it is a complex story of how the Enlightenment project to name and number our streets has coincided with a revolution in how we lead our lives and how we shape our societies. We think of street addresses as purely functional and administrative tools, but they tell a grander narrative of how power has shifted and stretched over the centuries.