 Reid rejects eudaimonism thus understood. It is safe to assume that Reid took Butler’s attack on what we might call descriptive eudaimonism to be decisive: There is no plausibility to the idea that agents necessarily will their own happiness, as they understand it, for they can knowingly act in self-destructive ways (cf. EAP III.ii.i: 95). But Reid realized that Butler’s attack left prescriptive eudaimonism, or the view that the practically rational agent takes her own well-being to have motivational primacy, relatively untouched. According to this view, whatever may be the case about how agents actually act, they ought to view their own well-being as having motivational primacy.