 Complete the following phrase:  The IsraeliPalestinian conflict has its roots in the late 19th and early 20th centuries, with the birth of major nationalist movements among the Jews and among the Arabs, both geared towards attaining sovereignty for their people in the Middle East. The Balfour Declaration was a public statement issued by the British government in 1917 during the First World War announcing support for the establishment of a national home for the Jewish people in Palestine. The collision between those two movements in southern Levant upon the emergence of Palestinian nationalism after the 