Work on Scotus’s moral psychology and action theory has been concerned almost exclusively with questions about the relationship between will and intellect and in particular about the freedom of the will itself. In this chapter I broaden the scope of inquiry. For I contend that Scotus’s views in moral psychology are best understood against the background of a long tradition of metaethical reflection on the relationship between being and goodness. In the first section of this chapter, therefore, I sketch the main lines of that tradition in medieval thinking and examine the novel and sometimes daring ways in which Scotus appropriated them. In the sections that follow I elaborate on three areas of Scotus’s action theory, very broadly conceived, in which his modifications of the medieval metaethical tradition can be seen bearing philosophical fruit. Thus, in the second section I examine his account of the goodness of moral acts, in the third his understanding of the passive dispositions of both sensitive appetite and will, and in the fourth his account of the active power of will.