Last year, I was at a dinner party where I was chatting with a stranger. I learned she was a professor at a nearby university. “And what do you do?” she asked politely. I unexpectedly froze — how should I describe how I spend my days? For many years I was a lawyer, but I don’t practice law anymore. “I’m home with the kids,” I said after a pause, but then wondered whether that was an accurate answer. First, we’re not actually home that much, but often rather at libr...