In the concluding pages of "Superclass" it becomes increasingly difficult to dispel the impression that you have just read what amounts to a 380-page business card. Many recent nonfiction books on "current affairs" are little more than that. Organized around a catchy concept and extensively researched by underlings, they win their authors jobs in think tanks and speaking engagements at corporate workshops and conferences -- all of which pay much, much more than anyone can expect to make on a book. There are a handful of important ideas in "Superclass," it's true, but many of them have been gleaned from other, more original thinkers. There are also a lot of facts and statistics, presumably gathered by Rothkopf's assistants.