 It is interesting to observe, however, that with respect to both parts of the task, the theist may enlist non-theists as allies. The theist may well make common cause with ethical naturalists as well as ethical non-naturalists in defending moral realism against “projective” theories such as expressivism. However, the theist may also enlist the support of error theorists such as J. L. Mackie (1977), and moral nihilists such as Friedrich Nietzsche (1887) in arguing that God is necessary for objective morality. Nietzsche, for example, explicitly holds that God does not exist, but also claims that God’s non-existence undermines the reality of traditional western morality. The fact that theists can enlist such unlikely allies does not mean the moral argument for God’s existence is sound, but it does suggest that the argument is not obviously question-begging, since both premises are sometimes accepted by (different) non-believers.