Braden R. Allenby is Founding Director of the Center for Earth Systems Engineering and Management, Lincoln Professor of Engineering and Ethics, and Professor of Civil and Environmental Engineering at Arizona State University. He is the author of Reconstructing Earth: Technology and Environment in the Age of Humans.

Daniel Sarewitz is Professor of Science and Society and Cofounder and Codirector of the Consortium for Science, Policy, and Outcomes at Arizona State University and the author of Frontiers of Illusion.