20th-century Western painting painted women, reminiscent of African tribal masks and his own new proto-Cubist inventions. Analytic cubism, exemplified by "Violin and Candlestick, Paris", was jointly developed by Pablo Picasso and Georges Braque from about 1908 through 1912. Analytic cubism was followed by Synthetic cubism, characterized by the introduction of different textures, surfaces, collage elements, papier collé and a large variety of merged subject matter. Crystal Cubism was a distilled form of Cubism consistent with a shift between 1915 and 1916 towards a strong emphasis on flat surface activity and large overlapping geometric planes, practised by Braque, Picasso, Jean Metzinger, Albert Gleizes, Juan
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