 The matter of omissions turns out to be particularly challenging for those who want to hold disorganized groups morally responsible for anything, since, as Joseph Metz (2021) points out, it is hard to see how an individual contributes anything to a collective omission to prevent harm if she could not have made a difference to that harm’s coming about (or at least not on her own). But, Metz argues, we can scale things up to a model of group capability and point to the ability of a group of individuals who did nothing to, say, prevent global warming, and use that ability to say that they could have acted together to prevent the harm.