As I write this, in the midst of a terrible pandemic, I am buoyed by one thing . . . and that's the rise of stories of selflessness and sacrifice around the globe. Selflessness has been on my mind a lot lately. It is, after all, the heart of caregiving, something I know quite a bit about. When my father was diagnosed with Alzheimer's disease, I did something drastic. I gave up the highest level of my career ambition in order to spend more...