The motivation question: Arguments from justice and from humanity

Two dominant arguments within international political theory, arguments from humanity and arguments from justice, can be distinguished along the lines of the well-known distinction between omissions and actions, respectively. The discussion in this paper shows that people in general are psychologically biased towards thinking that omissions producing harm are less morally grave than actions producing equivalent harm. It also canvasses evidence suggesting that greater moral gravity correlates with heightened guilt, and that heightened guilt is more likely to lead to action that would alleviate it, i.e. remedial or compensatory action. For those reasons, it is suggested that we should expect arguments from justice, which track actions, to be a more feasible means to the desired outcome of (local commitment to) global justice than arguments from humanity, which track omissions.