Professor Seth Lazar

Professor Seth Lazar

Position: Professor

School: School of Philosophy

Position: Founding Lead, Humanising Machine Intelligence

School: Humanising Machine Intelligence


Location: Level 6, RSSS Building, 146 Ellery Crescent


DPhil (Oxon) MPhil (Oxon) BA(Hons) (Oxon)

Researcher profile:

Personal website:

Moral and political philosophy, especially ethics of war, self-defence, risk, associative duties, corrective justice, rights.


2015 Sparing Civilians. Oxford: Oxford University Press.

Edited Volumes and Symposia

2017 Symposium on Ethics, Uncertainty, and Decision Theory. Ethics (guest editor), accepted 12/10/2016
2015  The Oxford Handbook of Ethics of War. Oxford: Oxford University Press (Co-Editor, with Helen Frowe). (Print version expected 2017)
2014 The Morality of Defensive War. Oxford: Oxford University Press. (Co-Editor, with Cécile Fabre)
2011 Symposium on Jeff McMahan’s Killing in War. Ethics (guest editor)

Journal Articles

2017 ‘Deontological Decision Theory and Agent-Centred Options’, Ethics, accepted 12/10/2016
2017  ‘Proxy Battles in the Ethics of War’ (with Laura Valentini), Oxford Studies in Political Philosophy, accepted 12/4/2016
2017  ‘Evaluating the Revisionist Critique of Just War Theory’, Daedalus, accepted 1/2/2016
2017 ‘Just War Theory: Revisionists Vs Traditionalists’, Annual Review of Political Science, accepted 12/5/2016, to appear in 2017 volume
2016 ‘Anton’s Game: Deontological Decision Theory for an Iterated Decision Problem’, Utilitas, online now
2016 ‘Complicity, Collectives, and Killing in War’, Law and Philosophy, online now
2016 ‘The Justification of Associative Duties’, Journal of Moral Philosophy, 13:1, 28-55
2015 ‘Risky Killing and the Ethics of War’, Ethics, 126:1, 91-117
2015 ‘Authorization and the Morality of War’, Australasian Journal of Philosophy, forthcoming in print, available online now
2015 'Authority, Oaths, Contracts, and Uncertainty in War’, Thought, 4:1, 52–58
2014 ‘Necessity and Noncombatant Immunity’, Review of International Studies, 40:1, 53-76
2013 ‘Associative Duties and the Ethics of Killing in War’, Journal of Practical Ethics, 1:1, 3-48
2012 ‘Necessity in Self-Defense and War’, Philosophy & Public Affairs, 40:1, 3-44
2011 ‘Introduction’, Ethics, 122:1, 8-9
2010 ‘A Liberal Defence of (Some) Duties to Compatriots’, Journal of Applied Philosophy, 27:3,  246-57
2010 ‘The Responsibility Dilemma for Killing in War: A Review Essay’, Philosophy & Public Affairs, 38:2, 180-213
2009 ‘Responsibility, Risk, & Killing in Self-Defense’, Ethics, 119:4, 699-728
2009 ‘Debate: Do Associative Duties Really Not Matter?’, Journal of Political Philosophy, 17:1, 90-101
2009 ‘The Nature & Disvalue of Injury’, Res Publica, 15:3, 289-304
2008 ‘Corrective Justice & the Possibility of Rectification’, Ethical Theory & Moral Practice, 11:4, 355–68

Chapters in Peer-Reviewed Edited Volumes

2016 ‘The Ethics of War’, (with Helen Frowe) The Oxford Handbook of Ethics and War, Seth Lazar & Helen Frowe (eds.), New York: Oxford University Press. Accepted 1/5/2016
2016 ‘Method in the Morality of War’, The Oxford Handbook of Ethics and War, Seth Lazar & Helen Frowe (eds.), New York: Oxford University Press. Online now
2016 ‘War’, Stanford Encyclopedia of Philosophy, Zalta (ed.), Spring 2016 edition:
2016 ‘War’s Endings and the Structure of Just War Theory’, The Ethics of War, Sam Rickless and Saba Bazargan (eds.), New York: Oxford University Press
2016 ‘Travel, Friends, and Killing’, in Philosophers Take on the World, Edmonds (ed.), Oxford: Oxford University Press, 25-27
2016  ‘The Associativist Account of the Ethics of War’, Global Political Theory, David Held and Pietro Maffettone (eds.), Cambridge: Polity, 158-179
2016 ‘Liability and the Ethics of War: A Reply to Strawser and McMahan’, The Ethics of Self-Defence, Coons and Weber (ed.), New York: Oxford University Press, 292-304
2014 ‘National Defence, Self-Defence, and the Problem of Political Aggression’, in The Morality of Defensive War, Lazar and Fabre (eds.), Oxford: Oxford University Press, 9-37
2013 ‘War’, International Encyclopaedia of Ethics, Lafollette (ed.), Wiley-Blackwell (8000 words)
2013 ‘Just War Theory’, Oxford Companion to Comparative Politics, Joel Krieger (ed.), Oxford University Press (3,500 words)
2012 ‘Scepticism about Jus Post Bellum’, Morality, Jus Post Bellum, and International Law" Larry May and Andrew Forcehimes (eds.), Cambridge: Cambridge University Press, 204-22
2012 ‘The Morality and Law of War’, Routledge Companion to Philosophy of Law, Andrei Marmor (ed.), London: Routledge, 364-79

Book Reviews

2014 Cécile Fabre’s Cosmopolitan War, Ethics, 124:2, 406-412, (3,500 words)
2011 ‘War: Essays in Political Philosophy’, Review, Mind, 120:479, 895-901 (3,000 words)

2013 ARC DECRA13 Award (2013: $119,000, 2014: $122,000, 2015: $125,000)
‘Justifying War’. Sole CI.

2017 ARC DP17 Award ($335,000). Lead CI. With Buchak, Hàjek, Jackson, Pettit, Steele.

Academy of Social Sciences of Australia Early Career Award (2016)

American Philosophical Association Frank Chapman Sharp memorial prize for the best unpublished monograph on the philosophy of war & peace. Biennial prize awarded for monograph derived from unpublished chapters of thesis. (2011)

American Philosophical Association, Australasian Association of Philosophy, Global Ethics Fellow of the Carnegie Council for Ethics in International Affairs

Guest lectures on normative ethics and the ethics of war.

Updated:  22 September 2022/Responsible Officer:  Head of School/Page Contact:  CASS Marketing & Communications