Descartes! The father of modern philosophy. And, though not known by most, one of the grandfathers of modern day physics. His thinking was clear and concise, his reasoning often solid and when he was in error, he at least had good reason for it. In this work, author John D. Heinmiller discusses one of Descartes most important views, metaphysical dualism. Using Descartes himself in a dialogue, Heinmiller allows Descartes to defend his views, his position, even his mistakes. Of course, such a work would be incomplete if the opposition was not presented. Charles Darwin is presented as opposing metaphysical dualism, and Isaac Newton is also presented as a judge between the two viewpoints.