Sal Restivo is Professor of Sociology and Science Studies at Rensselaer Polytechnic Institute. He is the author of The Social Relations of Physics, Mysticism, and Mathematics; The Sociological Worldview; Mathematics in Society and History; and Science, Society, and Values: Toward a Sociology of Objectivity. Jean Paul Van Bendegem is Professor of Philosophy and Logic at Vrije Universiteit in Brussels, and editor of the journal Philosophica. He is the author of Finite, Empirical Mathematics: Outline of a Model, and co-editor of Theory and Experiment. Roland Fischer is University Professor of Mathematics at Interuniversitares Forschungsinstitut fur Ferstudien in Klagenfurt, Austria. He is co-author of Mensch und Mathematik, and founder of the Journal of Mathematik-Didaktik.