SUMMARY
In this paper, I argue that principles of justice, contrary to what John Rawls and Thomas Nagel believe, do apply transnationally. I start with a debate about the proper scope of justice and defend the view according to which social practices, apart from the structure of the state, ought to be included in the purview of justice. However, I hold that there is no need to include individual behaviour, alongside social practices, opposing G. A. Cohen’s view on this matter and agreeing with Aaron James. I then argue for a relational account of equality, understood as a central principle of justice, whose application is feasible at the transnational level. Finally, I briefly discuss two examples of international social practices that could (and in my view ought to) be assessed in terms of social justice and respond to two objections to my position.