Dan Grunfeld: My grandma had friends survive the Holocaust who were tortured, beaten, starved and worse. She has seen that individual human beings can handle far more than most of us have ever had reason to know. Our strongest human instinct is to survive — so we are resilient and resourceful, especially when our lives are at stake. When we are pushed, when we are challenged, it is in our nature to respond. In desperate times, she says, people find strength in themselves that they didn’t know existed. This collective and innate strength of humankind is what will carry us through this pandemic.