The term "witch" pops up a lot around this time of year. It usually calls to mind images of wicked ladies in pointy hats, à la Margaret Hamilton in The Wizard of Oz. You might also think of the Salem with trials of 1692, in which 19 people were executed in what's now viewed as an instance of mass hysteria. But really? The term has been around for a very long time, and has carried with it a variety of connotations and historical baggage. It has been applied to men about as equally as it has to women. But now,...