Simo Knuuttila is Professor of Theological Ethics and the Philosophy of Religion at the University of Helsinki. His publications include Modalities in Medieval Philosophy (1993), Emotions in Ancient and Medieval Philosophy (2006), and numerous articles on the history of modal theory, semantics and the philosophy of mind. He is also editor of many books on the history of philosophy. Juha Sihvola (died 2012) was Professor of General History at the University of Jyväskylä and Director of the Helsinki Collegium for Advanced Studies in 2004–2009. He published widely on ancient philosophy, its later influence and contemporary political issues. He was editor of many books on ancient philosophy.