With the librarian Charlotte
B. Becker, he edited two editions of the multivolume Encyclopedia
of Ethics (first edition in two volumes, Garland, 1992; second
edition in three volumes, Routledge, 2001). His monographs
include Property Rights: Philosophic Foundations (Routledge
and Kegan Paul 1977; 1980), Reciprocity (Routledge and Kegan
Paul, 1986, University of Chicago Press, 1990), and A New Stoicism
(Princeton, 1998, 1999). Since
1979, he has had a variety of editorial roles at the journal Ethics,
including twelve years as an associate editor, a year as acting editor,
and two years as book review editor. He has also edited a number of special
symposium issues for that journal.
