Dreams—those fitful, provocative, natural hallucinations—have been a talking point for centuries. In the article “Understanding Dreams
,” Gail Bixler-Thomas considered the history of key thinkers on dreams and the evidence and documents of their ideas that were left behind. She notes that in Mesopotamia, Gilgamesh reportedly had recurring dreams that he shared with his mother, Ninsun, who then became “the first recorded dream interpret[er].” For many ancient cultures, dreams were considered prophecies. In more recent times, Sigmund Freud’s “The Interpretation of Dreams
” suggested that dreams were a window into the unconscious and subconscious mind.