 In the case of independent individuals reasoning morally with one another, we may expect that moral disagreement provides the occasion rather than an obstacle. To be sure, if individuals’ moral disagreement is very deep, they may not be able to get this reasoning off the ground; but as Kant’s example of Charles V and his brother each wanting Milan reminds us, intractable disagreement can arise also from disagreements that, while conceptually shallow, are circumstantially sharp. If it were true that clear-headed justification of one’s moral beliefs required seeing them as being ultimately grounded in a priori principles, as G.A. Cohen argued (Cohen 2008, chap. 6), then room for individuals to work out their moral disagreements by reasoning with one another would seem to be relatively restricted; but whether the nature of (clearheaded) moral grounding is really so restricted is seriously doubtful (Richardson 2018, §9.2). In contrast to what such a picture suggests, individuals’ moral commitments seem sufficiently open to being re-thought that people seem able to engage in principled – that is, not simply loss-minimizing – compromise (Richardson 2018, §8.5). 