Timo Airaksinen (PhD, Turku University, Finland, 1975) has been Full Professor of Ethics and Social Philosophy at the University of Helsinki, Finland since 1981. He is a Life Member of Clare Hall, Cambridge, and Vice-President of the Philosophical Society of Finland and the International Berkeley Society. He is Managing Editor of the journal Hobbes Studies (Brill). He has written The Philosophy of the Marquis de Sade (Routledge, 1995), The Philosophy of H. P. Lovecraft (Lang, 1998), and The Ethics of Coercion and Authority (University of Pittsburgh Press, 1988).Bertil Belfrage became University Lecturer in Philosophy at Lund University, Sweden in 1970, and Research Fellow in the History of Ideas and Sciences in 1993. He was Senior Editor of Berkeley Studies in 2005–2007, is editing a new scholarly edition of Berkeley’s works and has published numerous papers on different aspects of Berkeley’s philosophy.