Much of knowing what to do is knowing what to do for ourselves. But knowing how to act in our best interest is complex‐‐‐we must know what benefits us, what burdens us, and how these facts present and constitute considerations in favor of action. Not only this, we must know how we should weigh our interests at different times‐‐‐past, present, and future. What is needed, then, is a theory of prudence: a theory of how we ought to act when we are acting for ourselves. In this book, Dale Dorsey provides a comprehensive account of prudence, including the metaethics of prudential value, the nature of the personal good, the reasons of prudence, and the structure of prudential normativity over time.