the disruption of economies in the periphery that are transformed for the benefit of the developed world (the core). International migration occurs because powerful actors promote economic globalization at the expense of much of the world's population. In one of the few articles on migration in political theory that consider world systems theory, Van der Linden and Clark have drawn on Sassen's work to argue that the United States attracts migration because of its role in promoting and upholding an unjust global economic order.26 They refer to policies such as farm subsidies in the developed world and structural adjustment programs imposed on developing economies. They also discuss to the "international resource privilege" that allows the leaders of corrupt and violent regimes to sell their resources abroad, often usingLinden and Clark's focus on the United States to the exclusion of other important states and international actors is unfortunate. 27 Pogge, Thomas. 2002. World Poverty and Human Rights: Cosmopolitan Responsibilities and Reforms. Cambridge: Polity Press. ALEX SAGER 66 GLOBAL JUSTICE : THEORY PRACTICE RHETORIC (5) 2012 Though Van der Linden and Clark are right to draw attention to the causal role of the United States (or other powerful states) in shaping the conditions for migration, their conclusion that this requires that the United States open its borders to all potential migrants is too quick. Even if we accept their account of how the international system unjustly harms many people, it is not clear why this entails an obligation to open borders to migrants. Rather, the obvious remedial