Each one of us will eventually step into our final week. Some of us will know when we do. If so, we will take a thoughtful glance backward. And we won’t wish we had put in more hours at work. We won’t wish we had taken more extravagant vacations. We won’t wish we had spent more time staring at a screen. But we will wish we had spent more time with our friends. Because, as we’ll see next, friends are among life’s matchless necessities.