Question: when did the cubist movement start and end
Answer: According to Cooper there was `` Early Cubism '' , ( from 1906 to 1908 ) when the movement was initially developed in the studios of Picasso and Braque ; the second phase being called `` High Cubism '' , ( from 1909 to 1914 ) during which time Juan Gris emerged as an important exponent ( after 1911 ) ; and finally Cooper referred to `` Late Cubism '' ( from 1914 to 1921 ) as the last phase of Cubism as a radical avant - garde movement .