Research Interests (in no particular order):

Kant's Ethics
I have a contract with OUP for Significance and System in Kant's Ethics: Select Essays that will include some of my previously published work on Kant's ethics plus some new material. Recently, I have collaborated with Houston Smit on three related articles on topics in Kant's Metaphysics of Morals and his Lectures on Ethics. Sorin Baiasu and I are co-editing a collection of 44 newly written essays by renowned scholars covering a vast range of topics from the entire Kantian corpus entitled The Kantian Mind and will be published by Routledge Press. This large project is in its early stages.

Metaethics & Moral Phenomenology
In addition to my ongoing work on Kant's ethics, I continue to collaborate with Terry Horgan.  A Collection of our essays in metaethics entitled, Moral Twin Earth and Beyond is under contract with Oxford University Press. 

Terry and I are recipients of a John Templeton Foundation Grant in support of our writing a book in progress, Illuminating Reasons: An Essay in Moral Phenomenology. This grant also supports a conference to be held in Tucson, October 16-18, featuring nine talks that will be streamed live.   

Moral Epistemology
Aaron Zimmerman, Karen Jones, and I co-editing The Routledge Handbook in Moral Epistemology that will feature 30 commissioned essays covering topics that relate moral epistemology to science, normativity, and its applications. Another project in its early stages.

I organize the annual Arizona Workshop in Normative Ethics (WiNE) that takes place in Tucson each January.  The 6th Workshop, January 15-17, 2015 will feature Stephen Darwall, Susan Wolf, and David Schmidtz as keynote speakers. The full program will be available mid-July and will be posted on the workshop homepage, which includes details about the workshop location, accommodations, and registration (which is free).  

A selection of papers from the Workshop is published by Oxford University Press.  
Oxford Studies in Normative Ethics. Volumes 1-3 are in print, volume 4 will be out in Fall 2014.

Select Publications:

"The Perfect Duty to Oneself as an Animal Being", in Kant's Tugendlehre, A. Trampota, O. Sensen, and J. Timmermann (eds.), Berlin and New York: de Gruyter (2013): 2210243.

"A. C. Ewing's First and Second Thoughts in Metaethics", with Jonas Olson, in Underivative Duty: British Moral Philosophers from Sidgwick to Ewing, T. Hurka (ed.), Oxford: Oxford University Press (2011): 183-211. 

"The Moral Significance of Gratitude in Kant's Ethics" with Houston Smit, Southern Journal of Philosophy 49 (2011): 295-325.

"Toward a Sentimentalist Deontology",  In Moral Psychology, vol. 3, Walter-Sinnott-Armstrong (ed.), Oxford University Press, 2008.

"What Can Moral Phenomenology Tell Us about Moral Objectivity?" with Terry Horgan. In Objectivism, Subjectivism, and Relativism in Ethics, E.R. Paul, F.D. Miller, and J. Paul (eds.), Cambridge University Press, 2008.

"Moorean Moral Phenomenology", with Terry Horgan. In Moorean Themes in Epistemology and Ethics, S. Nuccetelli & G. Seay (eds.), Oxford University Press, 2007.

"Ethical Objectivity, Humanly Speaking: Reflection on Putnam's Ethics without Ontology", Contemporary Pragmatism, 2007.

"Cognitivist Expressivism", with Terry Horgan. In Metaethics after Moore, T. Horgan & M. Timmons (eds.), Oxford University Press, 2006.

"The Categorical Imperative and Universalizability", in  Kant's Groundwork for the Metaphysics of Morals: New Interpretations, Christoph Horn & Dieter Schonecker (eds.), de Gruyter, 2006.

"Expressivism, Yes! Relativism, No!" , with Terry Horgan. In Oxford Studies in Metaethics, vol. I., R. Shafer-Landau (ed.), Oxford University Press, 2006.

"Moral Phenomenology and Moral Theory", with Terry Horgan. Philosophical Issues 15, 2005.