James Joyner discovered that he’s an “influential” according to the authors of a new book entitled—you guessed it—The Influentials. Never mind that any first-year grad student in sociology or political science already knew this, because Elihu Katz and Paul Lazarsfeld wrote a book on it called Personal Influence, oh, way back in 1955 (yes, kids, 48 years ago). Now just wait until someone cribs Zaller for the biz-exec audience…