Part 1: Introduction - the levels, methods and points, Douglas Seanor and N.Fotion; the development of Hare's moral philosophy, W.D.Hudson. Part 2 Critics: act-utilitarianism and meta-ethics, R.B.Brandt; Hare on the levels of moral thinking, William K.Frandena; Hare's analysis of "Ought" and its implications, Allan Gibbard; problems with act-utilitarianism and with malevolent preferences, John C.Harsanyi; the foundations of impartiality, Thomas Nagel; prescriptivism, constructivism and rights, David A.J.Richards; levels of moral thinking, T.M.Scanlon; reasoning towards utilitarianism, Peter Singer; Hare on intuitive moral thinking, J.O.Urmson; changing places?, Zeno Vendler; the structure of Hare's theory, Bernard Williams.