Belief in the existence of the 'spiritual essence' of an immortal soul has infused human thought and history.  Still, most of today’s scientists remain materialists who believe that only the physical world is real. Today's topic pits the scientific materialists against whose who believe in the concept of 'dualism,' which requires some non-physical component — call it a 'soul' -- to transform the human brain into the human mind. Joining host Robert Kuhn are neuropsychologist Warren Brown; parapsychologist Dean Radin; transpersonal psychologist Charles Tart; philosopher of mind John Searle; and theoretical physicist Fred Alan Wolf. From the Series:USC Presents...Closer To Truth