When Vivek Murthy was a child, he’d wake every morning filled with a deep sense of dread. He would get out of bed, get dressed, eat breakfast, and feel the tightness in his chest expand through his body as he sat in the backseat of his parents’ car on the way to elementary school. “I didn’t want to be alone on the playground,” Murthy says on the Greater Good Science Center’s Science of Happiness podcast. “Or alone when they asked people to partner up in class on exercises. And I...