To some of those things we can say good riddance. But many we miss terribly. Whatever our emotional response to this departed realm, we are faced with the fact that nearly every aspect of modern life now takes place in filtered, isolated corners of cyberspace—a space that has slowly subsumed our physical habitats, replacing or transforming the office, our local library, a favorite bar, the movie theater, and the coffee shop where people met one another’s gaze from across the room. Even as we’ve gained the ability to gather without leaving our house, many of the fundamentally human experiences that have sustained us have disappeared.