Proto-Cubism cubes": In light of the headway made by Cézanne, the multiple use of the word "cube" with reference to diverse works by diverse artists, and the other factors involved (political, social, cultural), it has been suggested that Cubism, with its proto-phase, would have emerged regardless of Picasso's intervention. The art historian and collector Douglas Cooper viewed Cubist painting to have been the beginning of a stylistic revolution which was inevitable. The American art scholar and MoMA curator William Rubin argued that Braque, with his commitment to a Cézannist syntax, would have created early Cubism had Picasso never existed. Pablo Picasso's
Cubism Villon exhibited seven important and large drypoints, while his brother Marcel Duchamp shocked the American public with his painting "Nude Descending a Staircase, No. 2" (1912). Francis Picabia exhibited his abstractions "La Danse à la source" and "La Procession, Seville" (both of 1912). Albert Gleizes exhibited "La Femme aux phlox" (1910) and "L'Homme au balcon" (1912), two highly stylized and faceted cubist works. Georges Braque, Fernand Léger, Raymond Duchamp-Villon, Roger de La Fresnaye and Alexander Archipenko also contributed examples of their cubist works. During the late 19th and early 20th centuries, Europeans were discovering African, Polynesian, Micronesian and Native American