  Questions about what makes individuals individuals and what the relationship is between parts and wholes have been discussed in the context of metaphysics but these issues have not been much discussed in the literature on pluralism and monism in moral philosophy. However, these issues are implicit in discussions of the well-being, nature of friendship and pleasure, and in the literature on Kant’s categorical imperative, or on Aristotelian accounts of eudaimonea. Part of an investigation into the nature of these things is an investigation into whether there really is one thing or not. [7] 