Rik Peels is a university research chair in analytic and interdisciplinary philosophy of religion at the Faculty of Social Sciences and Humanities at the Vrije Universiteit Amsterdam in the Netherlands and a Senior Research Associate at the African Centre for Epistemology and Philosophy of Science at the University of Johannesburg in South Africa. His research interests are the ethics of belief, ignorance, scientism, fundamentalism, and extremism. He currently leads the ERC-funded project Extreme Beliefs: The Epistemology and Ethics of Fundamentalism (www.extremebeliefs.com). He is a member of the Adapt Academy, which studies how societies adapt to crises.
John Horgan is Distinguished University Professor at Georgia State University's Department of Psychology, where he directs the Violent Extremism Research Group (VERG). His research examines terrorist psychology. His books include The Psychology of Terrorism, Divided We Stand: The Strategy and Psychology of Ireland's Dissident Terrorists, Walking Away from Terrorism, and Terrorist Minds: The Psychology of Violent Extremism from Al-Qaeda to the Far Right.