In contrast to eudaimonism, Kant argues that moral reasoning and prudential reasoning are two distinct uses of practical reason, each with its own standard for good action. Despite Kant’s commitment to the ineradicable potential for fundamental conflict between these types of practical reasoning, I argue that once we shift to consideration of a developmental narrative of these faculties, we see that virtuous moral reasoning is able to substantively influence prudential reasoning, while prudential reason should be responsive to such influence. Further, (...) Kant indicates the integration of virtue as a commitment concerning practical priorities, and so too what should and should not agree with the agent, is beneficial for prudential reasoning by prudential reasoning’s own standards. Although Kant’s ethical system breaks from eudaimonism in significant ways, it retains the eudaimonist claim that virtuously-informed pursuits of happiness are not only better for virtue, but also better for happiness. (shrink)