Recently, I was walking through one of New York City’s terrific neighborhood street fairs teeming with colorful booths. Banners promised “Millions of Socks!” and vendors proudly displayed tie-dyed scarves and chocolate-covered marshmallows on skewers. The crowd had a Sunday pace and I happily relaxed into the mix of sun-soakers and serious shoppers. As I wandered, some who watch a bit of television offered their kind hellos as they passed by. A friendly guy selling piano lessons wanted to...