From a rawlsian-inspired relational conception of justice, the ideas of cooperation, reciprocity and interaction have been proposed to interpret the grounds for legitimate claims to distributive justice and to restrict its scope of application to particular political societies or states. This article analyses the main attempts to justify this restriction and argues against them. The paper will conclude with the presentation of another way of interpreting the relational conception of justice that makes possible a critical approach to the complex injustices with which we are challenged by the current globalizing world, according to which, if any element of the social structure imposes relations that can be evaluated as just or not, any of the...