David Leonhardt: Turn off your phone for Thanksgiving

This week, Americans will endure flight delays, traffic jams and other logistical miseries to spend time with family and friends. And when the holiday weekend is ending, many will lament that they don’t get to spend enough time with those relatives and friends.But during the weekend itself, these same lamenters will spend a lot of time ignoring the people around them and distractedly staring into their phones. They will get a notification and disappear down a digital rabbit hole of Faceboo