Paul Guyer is Jonathan Nelson Professor of Humanities and Philosophy at Brown University. He has been Visiting Professor at the University of Michigan, Princeton University, and Harvard University. He is a Fellow of the American Academy of Arts and Sciences and his other awards include the Centennial Medal from the Harvard Graduate School of Arts and Sciences, and the Alexander von Humboldt Foundation Research Prize, 2007-08.



Rolf-Peter Horstmann is Professor emeritus at Humboldt Universitÿt Berlin. H has been Visiting Professor at Brown University, University of Pennsylvania, New York University, University of California at Berkeley, Dartmouth College, and Princeton University.