This is an introduction to cubism, the movement often seen as the single most important development in the history of 20th-century art. The book offers an account of the origins of the style in the dialogue between Georges Braque and Pablo Picasso between 1907 and 1914. It traces cubism's evolution in the work of these two artists as well as Juan Gris, Fernand Leger, Robert Delaunay, Andre Derain, Albert Gleizes, Jean Metzinger and many others. The book situates cubism in the context of its times, and shows how it penetrated artistic activity far beyond painting and sculpture, reinvigorating architecture, graphic design, music and poetry, and transforming the possibilities of photography and film.