Most of Freud’s contemporaries believed that the human mind was all conscious. Historians of ideas who write about the development of psychology often get Freud's original contribution wrong because they don’t attend carefully enough to what was meant by terms like “subconscious mind” and “unconscious states.”

If the mind and the body are two separate things, as substance dualists believe, then how are the two connected to one another? Part 2 of our blog series on the mind-body problem.