During the last 30 years we Americans have been so politically divided that some of us have called this left-right, liberal-conservative split a "culture war" or even a "second Civil War." These descriptions are no longer accurate. The precise, technical word for what is happening in the United States today is revolution. Because of our country's history, we tend to think of revolutions as military conflicts, and of the revolutionaries as the good guys; the image of Minutemen fighting valiantly against the British forces at Lexington and Concord lies deep within our DNA. But sometimes -- quite often, actually --...