Descartes maintained that the entire universe consists of two substances, matter which exists in space and mind which has no spatial or physical properties. This doctrine becomes known as Cartesian dualism. Perhaps the hardest question for Cartesian...
With the emergence of the science of psychology in the 20th century, it is believed that thoughts and feelings can be translated into objective units scientists can observe. One advocate, British philosopher Gilbert Ryle who wrote a famous put-down ...
Seventeenth century materialists, led by British philosopher Thomas Hobbes, object to the idea of mind as a non-physical substance. For Hobbes the universe consists of "matter in motion," nothing else. If dualism struggles to account for how body an...