1. Abbey R (ed) (2013) Feminist interpretations of Rawls. Pennsylvania State University Press, University Park
2. Beitz C (1994) Cosmopolitan liberalism and the states system. In: Brown C (ed) Political restructuring in Europe: ethical perspectives. Routledge, London
3. Beitz C (2005) Cosmopolitanism and global justice. J Ethics 9(1/2):11–27
4. Charvet J (2013) The nature and limits of human equality. Palgrave Macmillan, Basingstoke
5. Diogenes Laertius (1972) Lives of eminent philosophers (trans: Hicks RD). Harvard University Press, Cambridge, MA