Rene Descartes was a famous philosopher, scientist, and French mathematician. Descartes was the first philosopher in the modern era to make a serious effort to vanquish skepticism and he was called the first modern man. His outlooks about knowledge and certainty, as well as his outlooks about the relationship between mind and body have been tremendously powerful over the last three centuries. Descartes was the origin of the mind and body problem. He had divided the world into mind, which is the ideal realm of thoughts and body as the material world. For Descartes, the physical world was a deterministic machine and that our thoughts could be free or undetermined.