In our eighth and final lecture, we investigate how World War I trauma created "unfathomable reservoirs of the absurd" that veterans couldn't express, leading to Freud's psychoanalytic theories gaining cultural prominence. We explore Freud's dream interpretation, his id-ego-superego model, and his controversial death drive theory. We then analyze how Freudian ideas influenced cultural movements, particularly Luigi Pirandello's theatrical exploration of multiple, contradictory selves, and the Surrealist movement's attempt to access and express this hidden psychological truth through art that suspends rational consciousness.