I am University Professor of Philosophy at York University in Toronto.

My research and teaching interests are in theoretical ethics and related issues in epistemology and philosophy of action, as well as in political philosophy.

My early work was mainly concerned to develop a theory that would reveal impartial beneficence, prerogatives and restrictions to be equally fundamental components of morality. More recently, I have been working on metaethical questions concerning the possible objectivity of value, and especially on the question whether philosophers have been hindered in their thinking here by inadequate conceptions of what desires are.