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
Crystal Cubism towards the end of 1916, with an art world still under the pressures of war, to show the parallels between the poetic theories of Guillaume Apollinaire of Max Jacob and himself in marking the burgeoning of a new era for poetry and artistic reflection. In "Nord-Sud" Reverdy, with the help of Dermée and Georges Braque, exposed his literary theories, and outlined a coherent theoretical stance on the latest developments in Cubism. His treatise "On Cubism", published in the first issue of "Nord-Sud", did so perhaps most influentially. With his characteristic preference for offense rather than defense, Reverdy launched an attack