World War I has long been considered literary modernism’s defining historical event, a catastrophe that changed avant-garde optimism into postwar pessimism and fragmentation; however, the utopian rhetoric of post-World War I architecture, along with writers’ enthusiastic elaboration of that rhetoric through architectural criticism, undermines any neat division. Instead, this chapter establishes a late 1920s and 1930s tendency to identify in hindsight a wartime rupture between the national future and the modernist future, as literary and architectural cooperation began to dissolve. Amid the rise of architectural modernism in Britain, Evelyn Waugh, John Betjeman, and Wyndham Lewis scrutinized the cultural integration of modernist forms. While Waugh and Betjeman increasingly emphasized modernist architecture’s inability to provide a lasting social or physical structure for the nation, Lewis rued the perceived cooption of modernism by leftist, materialist movements and instead promoted the values of “extreme modernism.”