Nicole Hassoun has recently defended the view that the relatively affluent members of the world’s population are, prima facie, obligated to ensure that the global institutional system enables all people to meet their basic needs. This paper is a critical discussion of Hassoun’s argument in favor of this view. Hassoun’s argument is first presented. In sections three and four, I try to bring out a number of formal and informal problems with the argument. Section five discusses a number of possible (...) replies to the worries raised in section four. The conclusion of the paper is that Hassoun’s argument should be rejected. There are two independent and individually sufficient reasons for this conclusion: the argument is invalid and contains at least one false premise. (shrink)