My research is focused on topics in metaethics and moral psychology, especially the meaning and use of evaluative language, the nature of normativity, and how our evaluative judgments are related to our desires and motivations.
I defend the view that evaluative judgments are factual judgments about the world, made from the perspective of our concern for particular ends. Methodologically, I favour the study of natural language as a way of analyzing our evaluative concepts.
I received my bachelors and masters degrees from the University of Auckland, and my PhD from the University of Illinois, Urbana-Champaign in 2001. I have taught at the University of Southern California since 2002, where I also hold the position of Professor.