The contemporary notion of justice has the features of Globality, Complexity, Stringency, and Reasonableness. What these features make clear is that justice is both stringent and broad: its requirements are hardest to overrule, and its various grounds give its value much internal complexity and broad scope in its applicability. At the global level, these grounds make up a certain frame of human life for which all of humanity has a shared responsibility. But parallel to domestic debates, for a theory of global justice there are many domains of interaction that are subject to moral considerations, but not to justice. My account captures the reach of distributive justice in a public reason approach. This approach draws a contrast between comprehensive moral views that cover many domains of life and an overarching public reason view that concerns only the domain of justice. A genuinely global understanding of justice requires such a framework.