Incompleteness and Moral Change
This chapter argues that the objectivity and determinacy of moral requirement can be maintained even though the moral habitat system of duties is subject to progressive change and amendment. Like engineering or medicine, it has the structure of a practical science with fundamental laws and values and a deliberative pragmatics for absorbing new knowledge and taking on new tasks. There is no complete or ideal system of duties. A significant upshot of this is that individuals have an imperfect duty to be agents of moral change. They must attend to moral practices and give voice to faults they see. Responding explicitly to a region of concern can have due care priority over unilaterally making things better. It is part of the idea of the moral habitat project to expect moral change as an ongoing collective project of responsiveness to its defining set of moral values.