I'm teaching Banned Books and Novel Ideas this year, and most of the books I've chosen focus on the experience of trauma, whether on the level of the individual or the mass. One of the ways that I explain the concept of trauma to my class is by referring to Freud's Beyond the Pleasure Principle, in which he explains the concept of the repetition compulsion as a response to traumatic experiences. The repetition compulsion manifests as a constant reliving of the trauma, often taking the form of dreams or nightmares, daydreams, or even subconscious actions.