About a year ago, like most of you, I enjoyed my last live public event. It was a library talk about music and, in spite of ominous rumblings and warnings about the new virus, we had a good audience. Nobody was wearing a mask. We’ve been hearing many such stories around this one-year anniversary — the last family gathering, the last sociable dinner, the last haircut or the last long-distance flight. All our social relationships and interactions have become distant and obscure.