Book excerpt: First Published in 1992. On questions of faith, Ernest Gellner believes, three ideological options are available to us today. One is the return to a genuine and firm faith in a religious tradition. The other is a form of relativism which abandons the notion of unique truth altogether and resigns itself to treating truth as relative to the society or culture in question. The third, which Gellner calls enlightenment rationalism, upholds the idea that there is a unique truth, but denies that any society can ever possess it definitively. Learned and stimulating, Professor Gellner’s book is an important contribution to our understanding of postmodernism and the relations between Islam and the West. It will be of great interest to anyone concerned with the ideological condition of contemporary society.