 Understood as a kind of obligation, Gilbert’s insight about a distinctive normative relation holding between participants in shared agency risks rejection. Many find obligation, and especially the no-unilateral withdrawal condition, to be too strong. Gilbert’s general idea might find wider acceptance if we talk instead of commitment that allows for unilateral  withdrawal.[38]  Finally, Stroud (2010) has suggested a normative condition in some respects even weaker. Stroud holds that participants in shared activity have a prerogative—a moral permission—that can override or mitigate moral obligations had to non-participants (such as that of beneficence). It remains to be seen to what extent this might address the intuitions that motivated Gilbert’s original and important insight.