In the mid-1980s I attended a series of graduate seminars, run by Derek Parfit, on Sidgwick’s Methods of Ethics. Parfit began the first seminar by claiming that the Methods was the greatest book on ethics ever written.

Roger Crisp, ‘Sidgwick and the Boundaries of Intuitionism’, in Philip Staton-Lake (ed.), Ethical Intuitionisms: Re-Evaluations, Oxford, 2003, p. 56