These essays examine the nature of self-interest and the relationship between rationality and morality. Some challenge the assumption that morality is exclusively concerned with the pursuit of the good of others, arguing that self-interest can be a legitimate moral motive. Some ask whether it is possible to resolve the apparent conflict between self-interest and morality by appealing to some third, overarching standard, or by showing that self-regard and regard for others share significant common features or spring from a common source. Others explore the relationship between self-interest and practical reason, or between self-interest and virtue.