 If we deny three-dimensionalism and instead view ourselves as objects that persist through time by having temporal parts, then does that justify caring less about temporal parts in the distant future that are less strongly linked with our present part? Derek Parfit famously argued that a proper understanding of what we care about when we care about our own future persistence should motivate us to be less self-interested and more interested in redistributing resources to others. Endurantists have argued that facts about how we persist through time underwrite a strong distinction between moral principles (which concern what we owe to others now) and prudential rationality (which concerns what we owe to our future selves).