After I finished speaking to her class at Georgetown Law School a dozen years ago, Esther Lardent, founder of the Pro Bono Institute, drove me back to my hotel. It was a chance to unwind and catch up. As we inched along in traffic, Esther began to keep time with a song on the radio.

“I bet you didn’t know this,” she said in her unmistakable scratchy voice, “but there was a time when I had seen every tour by the Rolling Stones in America.”