The term 'jihad' has come to be used as a byword for fanaticism and Islam's allegedly implacable hostility towards the West. But, like other religious and political concepts, jihad has multiple resonances and associations, its meaning shifting over time and from place to place. Jihad has referred to movements of internal reform, spiritual struggle, social progress, self-defence and even poetic expression as much as to 'holy war'. Jihad, moreover,...