 The intrinsic moral authority of the natural law has been a matter of debate since Aquinas: it was a central issue dividing Aquinas’s view from those of Scotus, Ockham, and Suarez. It continues to be an issue between natural law theorists like Grisez (1983) and Finnis (1980) on one hand and theological voluntarists like Adams (1999) and Hare (2001) on the other. Natural law theorists have several options: they can argue against any meaningful distinction between morality and the reasonable more generally (Foot 2000, pp. 66–80); or they can embrace the distinction, but hold that on the clearest conception of the moral that we possess, the natural law account of reasonableness in action adequately satisfies that conception (Murphy 2001, pp. 222–227); or they can hold that the notion of ‘morally right’ is so muddled that it should be jettisoned, leaving in its stead the notion of the reasonable (cf. Anscombe 1958). It is at present far from clear which of these avenues of response the natural law theorist has most reason to embrace.