The cosmopolitan political tradition in Western thought begins with the Greek Cynic Diogenes, who, when asked where he came from, responded that he was a citizen of the world. Rather than declaring his lineage, city, social class, or gender, he defined himself as a human being, implicitly asserting the equal worth of all human beings.
Nussbaum pursues this "noble but flawed" vision of world citizenship as it finds expression in figures of Greco-Roman antiquity, Hugo Grotius in the seventeenth century, Adam Smith during the eighteenth century, and various contemporary thinkers. She confronts its inherent tensions: the ideal suggests that moral personality is complete, and completely beautiful, without any external aids, while reality insists that basic material needs must be met if people are to realize fully their inherent dignity.
The insight that politics ought to treat human beings both as equal to each other and as having a worth beyond price is responsible for much that is fine in the modern Western political imagination. The Cosmopolitan Tradition extends Nussbaum's work, urging us to focus on the humanity we share rather than all that divides us.
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