“In 1927, Robert Graves published a little book called *Lars Porsena or the Future of Swearing and Improper Language*. He noted a recent decline in the use of foul language by the English, and predicted that this decline would continue indefinitely, until foul language had all but disappeared from the average man’s vocabulary. History has not borne him out, to say the least: indeed, I have known economists make more accurate predictions.”