Conflicts between domestic inequality and global poverty: lexicality versus proportionality

Current views on global justice often hold that affluent states are under at least two duties: a duty to reduce socioeconomic inequalities at home and a duty to reduce extreme poverty abroad. Potential duty conflicts deriving from resource scarcity can be solved in broadly two principled ways. The ‘lexical’ principle requires all disputed resources to be allocated to the weightiest duty. The ‘proportionality’ principle requires resources to be distributed between the two duties according to their relative weight (the weightiest duty receives the largest resource share, but the less weighty duty receives a share too). I argue that the proportionality principle is morally preferable. I show that it is sensitive to a number of factors that are intuitively relevant when solving duty conflicts: the number of affected individuals, the size of the benefits each individual could get, and the time it could take to eventually comply with the less weighty duty. Some argue that the lexical principle should nevertheless be preferred because domestic egalitarian duties are duties of justice, and they are therefore lexically prior to mere humanitarian duties to reduce global poverty. I reject this view by showing that duties of justice are not necessarily lexically prior to humanitarian duties, and that (even if they were) duties to reduce global poverty can be regarded as duties of justice too