What is it for you to be conscious? To be conscious now, for instance, of the room you are in? Theories on offer divide into just two categories, labelled by Ted Honderich as devout physicalism and spiritualism. The first reduces consciousness to no more than the physical, while the second takes it out of space and into mystery. But none of the proposed solutions has worked convincingly, and the reason, according to Honderich, lies in the persistent and resilient human belief that consciousness really is different. Hence his new theory of Radical Externalism, set out here and then criticised by eleven other leading philosophers, whose verdicts are in turn subjected to a full response by Honderich himself. Does the problem of consciousness survive this latest theory? Does the theory survive such sharp discussion? It is for the reader to judge, but one thing is certain — it is time for a change.

What is it for you to be conscious? To be conscious now, for instance, of the room you are in? Theories on offer divide into just two categories, labelled by Ted Honderich as devout physicalism and spiritualism. The first reduces consciousness to no more than the physical, while the second takes it out of space and into mystery. But none of the proposed solutions has worked convincingly, and the reason, according to Honderich, lies in the persistent and resilient human belief that consciousness really is different. Hence his new theory of Radical Externalism, set out here and then criticised by eleven other leading philosophers, whose verdicts are in turn subjected to a full response by Honderich himself. Does the problem of consciousness survive this latest theory? Does the theory survive such sharp discussion? It is for the reader to judge, but one thing is certain — it is time for a change.