The book explores concepts throughout the history of philosophy that suggest the possibility of unconscious thought and lay the foundation for ideas of unconscious thought in modern philosophy and psychoanalysis. The focus is on the workings of unconscious thought and the role it plays in thinking, language, perception, and human identity.

John Shannon Hendrix is a professor at the University of Lincoln, UK, and Roger Williams University, US. His previous books includeThe Contradiction between Form and Function in Architecture,Architecture and Psychoanalysis,Aesthetics and the Philosophy of Spirit: From Plotinus to Schelling and Hegel, andArchitectural Forms and Philosophical Structures.

Introduction1. Plotinus: The First Philosopher of the Unconscious2. The Peripatetics and Unconscious Thought3. The Active Intellect of Averroes4. Robert Grosseteste: Imagination and Unconscious Thought5. Unconscious Thought in the Philosophy of Immanuel Kant6. Unconscious Thought in Eighteenth- and Nineteenth-Century Philosophies7. Unconscious Thought in Freud8. Unconscious Thought in Lacan