id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-4343 Derek Parfit - Wikipedia .html text/html 5884 808 62 Derek Antony Parfit FBA (/ˈpɑːrfɪt/; 11 December 1942 – 1[3][4][5][6] or 2[7][8] January 2017) was a British philosopher who specialised in personal identity, rationality, and ethics. He was awarded the 2014 Rolf Schock Prize "for his groundbreaking contributions concerning personal identity, regard for future generations, and analysis of the structure of moral theories."[11] In Part I of Reasons and Persons Parfit discussed self-defeating moral theories, namely the self-interest theory of rationality ("S") and two ethical frameworks: common-sense morality and consequentialism. Applying total utilitarian standards (absolute total happiness) to possible population growth and welfare leads to what he calls the repugnant conclusion: "For any possible population of at least ten billion people, all with a very high quality of life, there must be some much larger imaginable population whose existence, if other things are equal, would be better, even though its members have lives that are barely worth living."[14]:388 Parfit illustrates this with a simple thought experiment: imagine a choice between two possible futures. ./cache/en-wikipedia-org-4343.html ./txt/en-wikipedia-org-4343.txt