Professor Sorell has published widely in philosophy. He works in early modern philosophy and historiography of philosophy, moral theory and applied ethics, and , less actively, epistemology and philosophy of science. He has published books on Hobbes, Descartes, scientistic tendencies in analytic philosophy, and the alleged limitations of systematic moral theory. In applied ethics he is the author of Moral Theory and Capital Punishment (1987) and (with John Hendry) Business Ethics (1994); He is editor or co-editor of nine volumes of papers, mainly in early modern philosophy.. He is currently working on a book on the moral and political theory of emergencies. He leads a number of funded research projects with implications for UK and European public policy.