This is a book about artistic modernism contending with the historical transfigurations of modernity. As a conscientious engagement with modernity's restructuring of the lifeworld, the modernist avant-garde raised the stakes of this engagement to programmatic explicitness. But even beyond the vanguard, the global phenomenon of jazz combined somatic assault with sensory tutelage. Jazz, like the new technologies of modernity, re-calibrated sensory ratios. The criterion of the new as self-making also extended to names: pseudonyms and heteronyms. The protocols of modernism solicited a pragmatic arousal of bodily sensation as artistic resource, validating an acrobatic sensibility ranging from slapstick and laughter to the pathos of bereavement. Expressivity trumped representation. The artwork was a diagram of perception, not a mimetic rendering. For artists, the historical pressures of altered perception provoked new models, and Ezra Pound's slogan 'Make It New' became the generic rallying cry of renovation. The paradigmatic stance of the avant-garde was established by Futurism, but the discovery of prehistoric art added another provocation to artists. Paleolithic caves validated the spirit of all-over composition, unframed and dynamic. Geometric abstraction, Constructivism and Purism, and Surrealism were all in quest of a new mythology. Making it new yielded a new pathos in the sensation of radical discrepancy between futurist striving and remotest antiquity. The Paleolithic cave and the USSR emitted comparable siren calls on behalf of the remote past and the desired future. As such, the present was suffused with the pathos of being neither, but subject to both.