“I wish it were socially impossible to write a letter,” wrote Edna St. Vincent Millay. “I wish there were no post office, no stamps, no facilities whatever for expediting the smug, intrusive, tedious letters that people write.” St. Vincent Millay wrote this, of course, in a letter. Because back in 1900s, when you wanted to rant about letters, you needed a letter to do it. For some, it was what was written that mattered. An expression from deep w…