 Thomas Aquinas (1225–1274) attempted to synthesize major strands of Aristotle’s systematic philosophy with Christian theology, and so Aquinas begins his complex discussion of human action and choice by agreeing with Aristotle that creatures such as ourselves who are endowed with both intellect and will are hardwired to will certain general ends ordered to the most general goal of goodness. Will is rational desire: we cannot move towards that which does not appear to us at the time to be good. Freedom enters the picture when we consider various means to these ends and move ourselves to activity in pursuit of certain of them. Our will is free in that it is not fixed by nature on any particular means, and they generally do not appear to us either as unqualifiedly good or as uniquely satisfying the end we wish to fulfill. Furthermore, what appears to us to be good can vary widely—even, over time, intra-personally. So much is consistent with saying that in a given total circumstance (including one’s present beliefs and desires), one is necessitated to will as one does. For this reason, some commentators have taken Aquinas to be a kind of compatibilist concerning freedom and causal or theological determinism. In his most extended defense of the thesis that the will is not ‘compelled’ (DM 6), Aquinas notes three ways that the will might reject an option it sees as attractive: (i) it finds another option more attractive, (ii) it comes to think of some circumstance rendering an alternative more favorable “by some chance circumstance, external or internal”, and (iii) the person is momentarily disposed to find an alternative attractive by virtue of a non-innate state that is subject to the will (e.g., being angry vs being at peace). The first consideration is clearly consistent with compatibilism. The second at best points to a kind of contingency that is not grounded in the activity of the will itself. And one wanting to read Aquinas as a libertarian might worry that his third consideration just passes the buck: even if we do sometimes have an ability to directly modify perception-coloring states such as moods, Aquinas’s account of will as rational desire seems to indicate that we will do so only if it seems to us on balance to be good to do so. Those who read Aquinas as a libertarian point to the following further remark in this text: “Will itself can interfere with the process [of some cause’s moving the will] either by refusing to consider what attracts it to will or by considering its opposite: namely, that there is a bad side to what is being proposed…” (Reply to 15; see also DV 24.2). For discussion, see MacDonald (1998), Stump (2003, ch. 9) and especially Hoffman &amp; Michon (2017), which offers the most comprehensive analysis of relevant texts to date.