Statement issued by the British government in 1917, which is often seen as the initiation of the process leading to the establishment of the State of Israel.
Issuing of the statement is believed to have been motivated just as much by British interests, as by the sympathy for the Zionist cause. At the eve of the World War I Britain needed the support from the World Jewry, which had been neutral, and which represented a large part of the population of Germany and Austria-Hungary. The declaration was drafted with the help of US President, Woodrow Wilson, who was a strong supporter of Zionism.
Secondly, Britain saw the need to protect the sea route to India, which passed through the Suez Canal, upon which much of Britain's economy relied. In accordance with the spirit of the time which emphasized the "self-determination of small nations", supporting Zionism would be the easiest way to secure lasting British influence in the region east of the Canal, especially because the Levant had been Ottoman until 1917.
Lord Rothschild, to whom the letter was addressed, was a leading British Zionist.
In 1920, the Balfour Declaration was included in the San Remo Agreement of 1920. From July 24, 1922, the declaration was included into the mandate from which Britain temporarily administered Palestine. However, with the White Paper of 1939, the Zionist-friendly attitude of the Balfour Declaration was suspended.
For the Arabs, the Balfour Declaration was perceived as an act of dishonesty, as the cooperation that had been going on between Arabs and the British during the World War 1, in the Hijaz region against Ottoman supremacy, had involved a promise of help to establish a united Arab country, reaching from the Red Sea to the Persian Gulf.