1. Amartya Sen, “Equality of what?”, in Tanner Lectures on Human Values, S. M. McMurring, ed., vol. I (Cambridge, Cambridge University Press, 1980
2. Aristotle, The Nicomachean Ethics, book I, sect. 7; in the translation by David Ross, World’s Classics (Oxford, Oxford University Press, 1980), pp. 12–14.
3. See G. E. M. de Sainte Croix, The Class Struggle in the Ancient Greek World (London, Duckworth, 1981)
4. Karl Marx and Friedrich Engels, The German Ideology (1846). The quoted passage is taken from the translation by David McLellan, Karl Marx: Selected Writings (Oxford, Oxford University Press, 1977), p. 190.
5. In many contexts, the formal representations will take the form of partial orderings, or of overdetermined rankings, or of “fuzzy” relations. This is, of course, not a special problem with the capability approach, and applies generally to conceptual frameworks in social theory; see Amartya Sen, Collective Choice and Social Welfare (San Francisco, Holden-Day, 1970