1. Appiah, Kwame A. 2008. Experiments in Ethics. Cambridge, MA: Harvard University Press.
2. Berlin, Isaiah. 2003. The Crooked Timber of Humanity. London: Pimlico.
3. Dunn, John. 1979. Western political theory in the face of the future. Cambridge: Cambridge University Press.
4. Dunn, John. 2000. The Cunning of Unreason. London: HarperCollins.
5. Estlund, David. 2007. Democratic Authority. Princeton, NJ: Princeton University Press.