Since Darkness at Noon deals heavily with the concepts of individuality and consciousness, you might do well to select "Consciousness Derived from Material Conditions" by Karl Marx for a comparative essay. In Darkness at Noon, individual consciousness is explored in relation to "grammatical fiction" and the inability to continue following indoctrinated lines of thought to their "logical conclusions" in adverse material conditions, specifically imprisonment. In addition, by associating grammatical fiction with both a toothache and daydreams of past events, consciousness is explored in various classes of material conditions. For instance, one such class of material condition relates to Rubashov's affair with Arlova. His relationship with Arlova has two interior classes of material conditions, those that exist before the Stalin purges and those that exist after the purges began.