Americans living in the first decades of the 20th century felt they inhabited a modern age. A spirit of excitement and experimentation transformed the world around them, in particular the consumer goods that filled their homes and offices. A Modern World draws upon the renowned collection of American decorative arts at the Yale University Art Gallery to explore the appearance and dissemination of modern design in the United States. This catalogue organizes roughly 300 examples of silver, glass, industrial design, furniture, medals, jewelry, and printed textiles into thematic groups that chart the aesthetic and social trends that defined American design from the Jazz Age to the Space Age. The authors consider modernism broadly—from handmade luxury goods to mass-produced housewares—establishing a context for the objects within larger international developments in architecture, avant-garde art, and scientific innovation. Entries are arranged in a series of chronological, thematic groups, offering new and compelling juxtapositions. Each group is introduced by an essay that presents the social, ideological, and aesthetic themes that unify the objects.