I’ve been thinking lately of this family that I saw last spring in the subway going uptown on the 4-train in New York. There was a mother with two girls, ages about 10 and 13. The three of them, though they were sitting together, looked so distant from each other.  The mother was looking off into space, the older girl was listening to music with her headphones and looking at no one, and the younger girl’s gaze was focused intensely on the screen of a video game in front of her.