In response to First World War propaganda campaigns and the emerging science of behaviorist psychology, which downplayed or even denied the existence of “mind” (understood as an agency directed by human cognition and will), American modernists performed the mind in and as writing: as a potentiating agent of mental plasticity to reshape habits, modifiy beliefs and behaviors, and dramatize the strategies by which consent is “manufactured.” An American modernist literary “aesthetics of exposure” sought to arrest habitual thought by exposing the behaviorist strategies of conditioning behavior and regimenting beliefs. The major works examined in this chapter – Ernest Hemingway’s A Farewell to Arms (1929) and John Dos Passos’ the U.S.A trilogy (1936) – deploy strategies of psychological and textual fracture and fragmentation in order to make state-sponsored propaganda technique visible and available for critique.