Duncan J. Needham is the Dean and Senior Tutor of Darwin College, Director of the Centre for Financial History, a Senior Researcher at the Centre for Risk Studies, and an Associate Lecturer at the Faculty of History, University of Cambridge. Julius F. W. Weitzdörfer is the Director of Studies in Law and a Charles & Katharine Darwin Research Fellow at Darwin College, a Research Associate at the Centre for the Study of Existential Risk, and an Affiliated Lecturer at the Faculty of Law, University of Cambridge.