Fundamentalists of all faiths have convinced themselves that militant piety is the only way to save religion from annihilation in an increasingly secularised world. If we are to stand any chance of beating terrorists after the attacks on the United States, we must try to understand their motivation and fears.
This is not a centuries-old phenomenon. Fundamentalism actually began in the US early in the 20th century. Today, it is by no means confined to the Muslim world, but has erupted in every major faith as a reaction against rational, secular modernity. It did not become widespread in the Islamic world until a degree of modernisation had been achieved in the late 1960s, after secular solutions such as nationalism or socialism seemed to have failed.