Following P. F. Strawson, a number of philosophers have argued that if hard incompatibilism is true, then its truth would undermine the justification or value of our relationships with other persons. In this paper, I offer a novel defense of this claim. In particular, I argue that if hard incompatibilism is true, we cannot make sense of: the possibility of promissory obligation, the significance of consent, or the pro tanto wrongness of paternalistic intervention. Because these practices and normative commitments are central to our relationships as we currently conceive of them, it follows that hard incompatibilism has radically revisionary conclusions.
