 Not only can the present generation influence the conduct of future people by affecting their desires and circumstances, it can also exercise power by setting back the interests of future generations. It can, for example, pursue a natural-resource policy with long-term negative consequences. In this case, the present generation imposes upon future generations the risk of having their options reduced to an inadequate range—unless, that is, future generations will have available to them and can afford to use technologies that allow them to adapt to the circumstances (Barry 1999; Beckerman 1999; Heyward 2017). By contrast, remote future people cannot at all affect the well-being of the lives of the presently living, at least not today and according to conceptions of well-being that have a subjective component. Still, such future people might nevertheless be considered able to set back the interests of or even wrong present or past persons insofar as the latter have, or had, interests with respect to posthumous future states of affairs. In the same way, the presently living may be morally constrained in their actions that relate to people who lived in the remote past (see  §5.4).