As millions of Jewish families hold Passover Seders this week, in many households the ritual celebration of deliverance from Egypt will be followed by talk of a new predicament. Prompted partly by a debate between two pugnacious lawyer-authors--and partly by dire statistics, which, over years, have become as rote as the Passover Haggadah--a generation will look at its children and speculate whether its grandchildren will be Jews at all.
Alan Dershowitz's book, The Vanishing American Jew (Little, Brown; 395 pages; $24.95), has been out only a month, but its title describes a crisis long under way. For decades, while their opportunities...