Immanuel Kant: Perpetual Peace (1795): three 'definitive articles': (1) the civil constitution of every state should be republican; (2) the law of nations should be founded on a federation of free states; (3) cosmopolitan right shall be limited to conditions of universal hospitality.
Charles Beitz: Political Theory and International Relations (1979), the first major cosmopolitan critique of Rawls. He argued that the global distribution of natural resources is arbitrary from a moral point of view, and proposed an international difference principle and a resource redistribution principle. The global economy shows enough interdependence to apply justice at the global level.
Thomas Pogge: Realizing Rawls (1989), World Poverty and Human Rights (2002).
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Argues that the wealthy nations and the global institutional order (trade rules, borrowing privileges, resource privileges) contribute to severe poverty and thus violate a negative duty not to harm (not merely a positive duty to assist).
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Proposes the Global Resource Dividend (GRD) (a small tax on the use of natural resources, the proceeds to help the global poor) and the Health Impact Fund (to reward drug companies for health impact rather than patent monopoly).
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Holds that poverty is a human rights deficit; the global order is institutional and the harm is foreseeable and avoidable.
Peter Singer: 'Famine, Affluence and Morality' (1972), One World (2002), The Life You Can Save (2009). A utilitarian argument that if we can prevent something bad from happening without sacrificing anything of comparable moral importance, we ought to do so; the drowning child analogy (the moral irrelevance of distance). He is a leading figure in the effective altruism movement.
Brian Barry: Humanity and Justice in Global Perspective (1982), Why Social Justice Matters (2005): global egalitarianism.
Martha Nussbaum: Frontiers of Justice (2006): the capabilities approach extended to disability, nationality and species membership; every person is entitled to a threshold of central capabilities, no matter where they live.
Amartya Sen: The Idea of Justice (2009): avoids a single blueprint of 'perfectly just institutions' and defends comparative, plural and open public reasoning, with 'open impartiality' (inviting perspectives from beyond the borders of one's community) as the way to reduce remediable injustice in the world.
Onora O'Neill: Bounds of Justice (2000), a Kantian cosmopolitan approach; Henry Shue: Basic Rights: Subsistence, Affluence and U.S. Foreign Policy (1980), arguing that security and subsistence are basic rights since the enjoyment of every other right depends on them, and creating correlative duties on everyone.
Nancy Fraser: Scales of Justice (2008): the problem of misframing (who counts as a subject of justice); three dimensions: redistribution, recognition and representation. Iris Marion Young: Responsibility for Justice (2011): the social connection model of responsibility, in which people who contribute through their actions to structural injustice share responsibility for remedying it.