Philip Gerrans
Professor of Philosophy, University of Adelaide

Philip Gerrans is a professor of philosophy at the University of Adelaide in Australia and an associate of the Swiss Center for Affective Sciences in Geneva, Switzerland. His latest book is The Measure of Madness: Philosophy of Mind, Cognitive Neuroscience, and Delusional Thought (2014).

Written by Philip Gerrans

Participants in a traditional Ayahuasca ritual of spiritual and physical healing in La Calera, Cundinamarca, Colombia in 2014. Photo by Eitan Abramovich/AFP/Getty

Essay/
Consciousness and altered states
Model hallucinations

Psychedelics have a remarkable capacity to violate our ideas about ourselves. Is that why they make people better?

Philip Gerrans & Chris Letheby