If the plagues of our modern age are screen addiction , anti-social behavior, and a desire for immediate gratification, all driven by the supercomputers constantly affixed to our hands, then Amtrak may be the antidote. On a 43-hour, 2,265-mile cross-country journey from Los Angeles to Chicago on Amtrak's Southwest Chief, I stared out the window at deep red mesas and Midwest farmland. I shared meals with strangers. I played chess with my husband while others watched before playing a game of