Sigurd Bergmann is Professor Emeritus of Religious Studies at the Norwegian University of Science and Technology, Trondheim.

Kate Rigby is Alexander von Humboldt Professor of Environmental Humanities and Director of the research hub for Multidisciplinary Environmental Studies in the Humanities at the University of Cologne, Germany.

Peter Manley Scott is Samuel Ferguson Professor of Applied Theology and Director of the Lincoln Theological Institute at the University of Manchester, UK.