MacAskill earned his BA in philosophy at Jesus College, Cambridge, his BPhil at St Edmund Hall, Oxford, and his DPhil in philosophy at St Anne's College, Oxford in 2014, supervised by John Broome and :sv:Krister Bykvist|Krister Bykvist. He then took up a junior research fellowship at Emmanuel College, Cambridge, before taking an associate professorship at Lincoln College, Oxford. MacAskill's research has two main focuses. The first addresses the issue of how one ought to make decisions under normative uncertainty; in addition to a DPhil on the topic, he has published on this issue in Ethics, Mind, and The Journal of Philosophy. His popular writing has been published in The New Yorker, The Guardian, The Independent, Time, The Atlantic, and The Washington Post. MacAskill has been an advisor to former British Prime Minister Gordon Brown. Bill Gates describes him as "a data nerd after my own heart."
''Doing Good Better''
MacAskill's second research focus is on effective altruism. His book on the topic, Doing Good Better, was published in 2015, and reviewed favorably in the London Review of Books, The Guardian, and The New York Times. In the book, he argues that many of the ways people think about doing good achieve very little, but that by applying data and scientific reasoning to the normally sentimental world of doing good, opportunities to have a huge positive impact can be found. MacAskill also makes controversial claims such as the fact that fair trade does very little to help the poorest farmers, that boycotting sweatshops might make things worse for the global poor and that people who pursue high-income careers such as plastic surgeons or wall street bankers could do more good than charity workers. MacAskill's argument that young idealists can consider working for Wall Street has been the subject of a New York Times op-ed by David Brooks. Brooks argued that, while effective altruists may start earning to give in order to realise their deepest commitments, their values may erode over time, becoming progressively less altruistic. In addition, Brooks objected to the view on which altruists should turn themselves "into a machine for the redistribution of wealth."
Talks and media appearances
In 2016, MacAskill appeared on the Making Sense podcast with Sam Harris, as well as The Tim Ferriss Show with Tim Ferriss. In 2018, MacAskill gave a TED talk on effective altruism at the TED conference in Vancouver, which was released on the 12 September 2018.
Personal life
MacAskill argued that men should consider changing their last names when they get married; he and his fiancée changed their name to "MacAskill", her maternal grandmother's maiden name. MacAskill and his wife, Amanda, have authored articles together on topics of ethical debate. MacAskill lives in Oxford.
Publications
Doing Good Better: Effective Altruism and a Radical Way to Make a Difference. London: Guardian Faber, 2015..