Justin Snedegar
Department of Philosophy
University of St Andrews

My research is largely focused on questions about the structure of normativity, including the nature of central normative concepts like reasons, ought, and requirement, and the relationships between them. Most of my work so far has defended contrastive theories of these concepts. The basic idea of a contrastive theory of a normative concept is that whether the agent ought to or is required to perform a given action, or whether some consideration is a reason for the agent to perform the action, depends on which deliberative question, conceived of as a set of alternatives, we are asking.

A newer project is to examine the relationships between pro tanto or contributory normative concepts, like reasons, and all things considered or overall normative concepts, like ought or requirement. Some central questions here involve the idea of the weight of reasons and of competition between reasons.

Here is a list of publications and works in progress. If there's no link, feel free to email me for a draft.


Contrastive Reasons, Oxford University Press, 2017
The book was reviewed by Hallvard Lillehammer on Notre Dame Philosophical Reviews, and by Chrisoula Andreou in Ethics. I replied to Andreou's review on PEA Soup

I talked about the book on the New Books in Philosophy podcast here.


'Reasons For and Reasons Against' (2018), Philosophical Studies, 175(3): 725-743
'Time-Slice Rationality and Filling In Plans' (2017), for a symposium on Brian Hedden's Reasons Without Persons in Analysis, 77(3): 595-607
'Reasons, Oughts, and Requirements' (2016), Oxford Studies in Metaethics, Vol. 11, edited by Russ Shafer-Landau (penultimate version)
'Contrastivism about Reasons and Ought' (2015), Philosophy Compass 10/6: 379-388
'Deontic Reasoning Across Contexts' (2014), Deontic Logic and Normative Systems: DEON 2014, edited by Cariani, Grossi, Meheus, and Parent. Springer Lecture Notes in Computer Science, 208-223
'Contrastive Reasons and Promotion' (2014), Ethics 125(1): 39-63
'One Ought too Many', with Stephen Finlay (2014), Philosophy and Phenomenological Research 89(1): 102-124
'Negative Reason Existentials' (2013), Thought 2(2): 108-116
'Reason Claims and Contrastivism about Reasons' (2013), Philosophical Studies 166(2): 231-242
'Contrastive Semantics for Deontic Modals' (2012), in Contrastivism in Philosophy, edited by Martijn Blaauw. Routledge, 116-133

Encyclopedia entries, book reviews, etc.

'Ethics and contrastivism' (2014), Internet Encyclopedia of Philosophy
Review of Weighing Reasons, edited by Errol Lord and Barry Maguire, Ethics, 128(1): 255-260, 2017
Review of Reasons, Rights, and Values, by Robert Audi, Notre Dame Philosophical Reviews, 2015

In progress

'Competing Reasons', for a volume on defeat, edited by Jessica Brown and Mona Simion, forthcoming with Oxford University Press
'Overlapping Reasons', with Barry Maguire
A paper on reasons and their role in deliberation (title removed for blind review)