 Ross’s pluralism faces attack from two opposing camps, from those who think there are fewer than five basic responsibilities and from those who think there are more. Ross intimates his list is the best representation of the core commitments of common-sense morality (RG 20; FE 190). He is sanguine we have these responsibilities. He says, for example, ‘the existence of an obligation arising from the making of a promise is so axiomatic that no moral universe can be imagined in which it would not exist’ (FE 77; also KT 42). He is not entirely confident there exist only five basic responsibilities. His list is offered ‘without claiming completeness or finality for it’ (RG 20; also 23).