Litteratur
Platon: The Republic, bok I, bok II, bok 4 . http://etext.library.adelaide.edu.au/aut/plato.html.
Aristoteles: Nicomachean Ethics, bok I , bok II, bok V, kap. 1-8 . http://etext.library.adelaide.edu.au/aut/aristotle.html.
Hobbes: Leviathan, kap. 13-19. http://etext.library.adelaide.edu.au/aut/hobbes_thomas.html.
Hume: A Treatise of Human Nature, bok III, del I, i-ii, bok III, del II, i-ii . http://etext.library.adelaide.edu.au/aut/hume_david.html.
Jürgen Habermas : Discourse Ethics: Notes on a Program of Philosophical Justification , 1992. Oxford: Polity Press. i Moral Consciousness and Communicative Action (s 43-109).