As a young lecturer in philosophy and the eldest son of a prominent Jewish family, Alan Montefiore faced two very different understandings of his identity: the more traditional view that an identity such as his carried with it, as a matter of given fact, certain duties and obligations, and an opposing view, emphasized by his studies in philosophy, according to which there can be no rationally compelling move from statements of fact--whatever the alleged facts may be--to "judgments of value." According to this second view, individuals must in the end take responsibility for determining their...