 Most ambitiously, the ultimate principles qua standards—that is, the principles which provide the deepest explanations of why right actions are right—could be well suited to guiding action directly. Arguably this is the view we find in Kant and in many modern Kantian moral theories. The categorical imperative is both the ultimate standard of right action and at the same time is well suited to guide the decision-making of a conscientious moral agent. This view of principled guidance ought to be distinguished from a distinct meta-ethical view according to which an ultimate moral standard must, if it is to be valid at all, be such that agents can be (in some sense) guided by it (Bales 1971; Smith 2012). Such a view may be attractive to those (such as Kant) who think that moral principles must comport with autonomy and that morality is a species of rationality. It may also be attractive to those who believe that moral principles must provide reasons on which agents can act. But even a very ambitious generalist model of principled guidance need not subscribe to this meta-ethical view. Kant, at least in some passages, encourages optimism about our ability to apply the ultimate standard of right and wrong directly to our individual decisions. Other philosophers within the generalist tradition, such as Ross, defend principles which look, on their face, to be eminently usable, and if Ross is correct that such principles are ultimate standards, then one might feel entitled at least to a weak presumption in favour of the claim that using them would be a good strategy.