This paper argues that there are practical problems of such a kind that nei
ther impartial morality nor rational choice theory can provide us with comf
ort and guidance in our attempt to make the right choice if confronted with
such a problem. It argues that both morality and rational choice theory ar
e bound to misconstrue problems of this kind. Appreciating the limits of bo
th morality and rational choice theory, as currently discussed in the liter
ature (Wolf, Morton, Pettit, Hollis and Sugden), enables us to identify the
features of these particular practical problems, and allows us to elaborat
e the idea of an alternative of oneself, which is crucial to a proper under
standing of the kind of practical problem the paper draws attention to.