Some of the most important issues in society today affect more than one generation of people. In this article, the authors offer a conceptual overview and integration of the research on intergenerational dilemmas-decisions that entail a tradeoff between one's own self-interest in the present and the interests of other people in the future. Intergenerational decisions are characterized by a combination of intertemporal (i.e., behaviors that affect the future) and interpersonal (i.e., behaviors that affect other people) components. Research on intergenerational dilemmas identifies factors that emerge from these dimensions and how they interact with each other to influence intergenerational beneficence. Critically, phenomena that result from the intersection of these two dimensions-such as immortality striving through legacy creation-are especially important in distinguishing intergenerational decisions from other related decision contexts.