Tolstoy famously wrote, "Happy families are all alike; every unhappy family is unhappy in its own way." To Tracy Farber, thirty-three, happily single, headed for tenure at a major university, and content to build a life around friends and work, this celebrated maxim is questionable at best. Because if Tolstoy is to be taken at his word, only unhappiness is interesting; happiness must be as placid and unmemorable as a daisy in a field of a thousand...