[澳]J.J.C.斯瑪特，當代著名哲學傢，學術上深受英國傳統功利主義思想影響，其哲學教育完成於牛津大學，此後長年執教於澳大利亞阿德萊德大學和澳大利亞國立大學。

[英]伯納德·威廉斯，當代道德哲學領域首屈一指的大師，早年在牛津大學研究哲學和古典學，曾先後擔任倫敦大學、劍橋大學、牛津大學和加州大學伯剋利分校的

Two essays on utilitarianism, written from opposite points of view, by J. J. C. Smart and Bernard Williams. In the first part of the book Professor Smart advocates a modern and sophisticated version of classical utilitarianism; he tries to formulate a consistent and persuasive elaboration of the doctrine that the rightness and wrongness of actions is determined solely by their consequences, and in particular their consequences for the sum total of human happiness. This is a revised version of Professor Smart's famous essay 'an outline of a system of utilitarian ethics', first published in 1961 but long unobtainable. In Part II Bernard Williams offers a sustained and vigorous critique of utilitarian assumptions, arguments and ideals. He finds inadequate the theory of action implied by utilitarianism, and he argues that utilitarianism fails to engage at a serious level with the real problems of moral and political philosophy, and fails to make sense of notions such as integrity, or even human happiness itself. Both authors are agreed on utilitarianism's importance: it cuts across a number of different philosophical disputes and combines a systematic account of mata-ethical problems with a distinctive and substantive moral stand. It thus is, or involves, philosophy in both the traditional and the narrower, professional sense of the word, and is a key topic (often the first topic) in introductory philosophy courses. This book should also be of interest to welfare economists, political scientists and decision-theorists.