Five of the essays give a new understanding of the objectivity of moral judgements. These are by Simon Blackburn, R.M. Hare, John McDowell, Susan Hurley and Bernard Williams. The remaining contributors – Philippa Foot, Steven Lukes, Amartya Sen, David Wiggins – give their attention to problems which are equally compelling, such as the defence of a moral outlook based on a conception of a need and of what follows from it. The volume also includes the addresses given by Simon Blackburn and George Cawkwell at the memorial service for John Mackie, and a list of his publications, compiled by Joan Mackie.