David Hume was born three hundred years ago, in 1711. The world has changed radically since his time, and yet many of his ideas and admonitions remain deeply relevant, though rather neglected, in the contemporary world. These Humean insights include the central role of information and knowledge for adequate ethical scrutiny, and the importance of reasoning without disowning the pertinence of powerful sentiments. They also include such practical concerns as our responsibilities to those who are located far away from us elsewhere on the globe, or in the future.

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As it happens, contemporary theories of justice have largely followed the Hobbesian route rather than the Humean one. They have tended to limit their considerations of justice within the boundaries of a particular state. In an important essay in 2005 called “The Problem of Global Justice,” Thomas Nagel explained that “if Hobbes is right, the idea of global justice without a world government is a chimera.” The most influential modern theory of justice, namely John Rawls’s theory of “justice as fairness,” presented in his epoch-making book A Theory of Justice, concentrates on the identification of appropriate “principles of justice” that fix the “basic institutional structure” of a society, in the form of a cluster of ideal institutions for a sovereign state. This confines the principles of justice to the members of a particular sovereign state. It is worth noting that in a later work, The Law of Peoples, Rawls invokes a kind of “supplement” to this one-country pursuit of the demands of justice—but in dealing with people elsewhere, Rawls’s focus is not on justice, but on the basic demands of civilized and humane behavior across the borders.

Amartya Sen on Hume, the rest here.  (HT MR)

Pip was right

In contrast, a number of other Enlightenment theorists (Adam Smith, Condorcet, Mary Wollstonecraft, Karl Marx and John Stuart Mill, for example) took a variety of approaches that shared an interest in making comparisons between different ways in which people's lives may go, jointly influenced by the working of institutions, people's actual behaviour, their social interactions, and other factors that significantly impact on what actually happens. The analytical, and rather mathematical, discipline of "social choice theory" – which can be traced to the works of Condorcet in the 18th century, but has been developed in the present form under the leadership of Kenneth Arrow in the last century – belongs to this second line of investigation. That approach, suitably adapted, can make a substantial contribution, I believe, to addressing questions about the enhancement of justice and the removal of injustice in the world.

In this alternative approach, we don't begin by asking what a perfectly just society would look like, but asking what remediable injustices could be seen on the removal of which there would be a reasoned agreement. "In the little world in which children have their existence," says Pip in Great Expectations, "there is nothing so finely perceived, and finely felt, as injustice." In fact, the strong perception of manifest injustice applies to adult human beings as well. What moves us is not the realisation that the world falls short of being completely just, which few of us expect, but that there are clearly remediable injustices around us which we want to eliminate.

Terrific piece by Amartya Sen in the Guardian, here.