Metaphor, as an act of human fancy, combines ideas in improbable ways to sharpen meanings of life and experience. Theoretically, this arises from an association between a sign-for example, a cattle car-and its referent, the Holocaust. These "sign-vehicles" serve as modes of semiotic transportation through conceptual space. Likewise, on-the-ground vehicles can be rich metaphors for the moral imagination. Following on this insight, Vehicles presents...