The article argues that religious fundamentalism, understood, roughly, as the view that people must obey God's commands unconditionally, is conceptually incoherent because such religious fundamentalists inevitably must substitute human judgement for God's judgement. The article argues, first, that fundamentalism, founded upon the normal sort of indirect communications from God, is indefensible. Second, the article considers the crucial case in which God is said to communicate directly to human beings, and argues that the fundamentalist interpretation of such communications is also incoherent, (...) and, on this basis, argues that religious fundamentalism is actually an extreme form of irreligiousness. Finally, the article considers Kierkegaard's prima facie defence of unconditional religious faith, and argues that, despite some similarity with the fundamentalists, Kierkegaard's appreciation of human finitude leads him to a profoundly anti-fundamentalist stance. (shrink)