Abstract

This chapter explains that the principle of personal good is a principle of separability in the dimension of people. Together with the coherence of good, it provides a basis for applying the separability theorem across the two dimensions of people and states of nature. This chapter starts by qualifying the principle of personal good in some ways, and explains the defence of the principle. One possible line of defence is metaphysical. It is to argue that suprapersonal entities such as nations are simply aggregates of people, and therefore cannot possess a good of their own apart from the good of the people who make them up. The principle is intended to apply to probability‐relative goodness to the goodness of uncertain prospects. The chapter defends it as applied to outcomes, and then extends the argument to probability‐relative goodness. An argument is certainly needed to justify the principle of personal good for probability‐relative goodness.