Samuel L. Clemens lost the 1882 lawsuit declaring his exclusive right to use "Mark Twain" as a commercial trademark, but he succeeded in the marketplace, where synergy among his comic journalism, live performances, authorship, and entrepreneurship made "Mark Twain" the premier national and international brand of American humor in his day. And so it remains in ours, because Mark Twain's humor not only expressed views of self and society well ahead...