Mark Alpert, the University of Texas professor whom I described as the Ur Maven, is the kind of person who would come over to your house and show you how to install or fix or manipulate a very complicated piece of software. Tom Gau, the quintessential Salesman, takes the very arcane field of tax law and retirement planning and repackages it in terms that make emotional sense to his clients. Lois Weisberg, the Connector, belongs to many different worlds—politics, drama, environmentalism, music, law, medicine, and on and on—and one of the key things she does is to play the intermediary between different social worlds.