“The smartphone is no longer just a device that we use, it’s become the place where we live,” said Prof Daniel Miller, who led the study. “The flip side of that for human relationships is that at any point, whether over a meal, a meeting or other shared activity, a person we’re with can just disappear, having ‘gone home’ to their smartphone.” This phenomenon was leading to the “death of proximity” when it comes to face-to-face interaction, he said. “This behaviour, and the frustration, disappointment or even offence it can cause, is what we’re calling the ‘death of proximity’. We are learning to live with the jeopardy that even when we are physically together, we can be socially, emotionally or professionally alone.”