The Balfour Declaration (1917)

The Balfour Declaration is a public letter, dated 2 November 1917, in which Britain’s foreign secretary Arthur James Balfour informed Walter Rothschild, 2nd Baron Rothschild, that His Majesty’s Government “view with favour the establishment in Palestine of a national home for the Jewish people.” It is 67 words long, was approved by the British War Cabinet the day before it was sent, and became the founding diplomatic document of the modern return of the Jews to their homeland: the first time a great power committed itself, in writing, to that goal. It was not a treaty, not a grant of statehood, and not Britain’s to make unilaterally in the eyes of many of its own drafters, but its language was carried forward into two binding international instruments within five years and has shaped the legal debate over Palestine ever since.

Who wrote it and to whom

The letter came from Arthur Balfour, Britain’s foreign secretary under Prime Minister David Lloyd George, and was addressed to Lord Rothschild, the most prominent Jewish peer in Britain and a financial backer of Zionist causes, with instructions to pass it to the Zionist Federation of Great Britain and Ireland. Behind it stood a sustained lobbying effort by Chaim Weizmann, a Russian-born chemist and the leading Zionist figure in wartime London, working alongside Nahum Sokolow. Weizmann had cultivated relationships across the British political class for years, and his wartime work developing an industrial process for acetone, a key ingredient in explosives, gave him direct access to ministers including Lloyd George and Balfour. The declaration itself was drafted and redrafted through the autumn of 1917, with cabinet member Sir Mark Sykes, of the earlier Sykes-Picot Agreement, shepherding the text through several versions before the War Cabinet approved the final wording on 31 October 1917.

Why it came about

The context was the First World War, still undecided in the autumn of 1917. Ottoman Turkey held Palestine, and British forces under General Edmund Allenby would not take Jerusalem until December of that year. Britain’s War Cabinet had several overlapping motives: a strategic interest in a friendly presence astride the land route to India and the Suez Canal once the Ottomans were defeated; a hope, based on an overestimate of Jewish influence common at the time, that a pro-Zionist statement would rally Jewish opinion in Russia (then collapsing into revolution and threatening to exit the war) and in the still-neutral United States behind the Allied cause; and genuine sympathy among figures like Balfour and Lloyd George, both raised on the Hebrew Bible, for the idea of a restored Jewish homeland. The declaration was issued alongside, and in some tension with, Britain’s earlier wartime promises: the 1915-1916 McMahon-Hussein correspondence encouraging Arab revolt against the Ottomans, and the secret 1916 Sykes-Picot Agreement carving Ottoman territory into British and French spheres. Palestine’s population at the time was estimated at roughly 700,000, of whom perhaps 60,000 to 85,000, about one in ten, were Jewish.

The text and its careful wording

The operative sentence reads in full: “His Majesty’s Government view with favour the establishment in Palestine of a national home for the Jewish people, and will use their best endeavours to facilitate the achievement of this object, it being clearly understood that nothing shall be done which may prejudice the civil and religious rights of existing non-Jewish communities in Palestine, or the rights and political status enjoyed by Jews in any other country.” Every clause was contested inside the War Cabinet. “National home” was chosen deliberately over “state,” a word Zionist leaders wanted and Lord Curzon and other skeptical ministers refused to grant, leaving the declaration’s ultimate scope ambiguous by design. The second clause, protecting “the civil and religious rights of existing non-Jewish communities,” was added at the insistence of Edwin Montagu, the only Jewish member of the cabinet and an anti-Zionist who feared the declaration would brand Jews everywhere as foreigners; it is the clause most often dropped by summaries that present the declaration as a simple, unconditional promise.

What happened as a result

The declaration was not self-executing; it was a statement of British policy that needed international ratification to carry legal weight, and it got it fast. France and Italy endorsed it in 1918, and the San Remo Resolution of 25 April 1920, agreed by the Allied powers dividing the former Ottoman Empire, incorporated its language directly into the postwar settlement. The League of Nations then wrote the Balfour text almost verbatim into the preamble and Article 2 of the Mandate for Palestine, approved 24 July 1922 and binding on Britain as the mandatory power, with the League Council’s unanimous vote making it international law rather than one government’s opinion. British enthusiasm cooled well before the mandate ended: the Peel Commission proposed partition in 1937, and the White Paper of 1939 sharply capped Jewish immigration on the eve of the Holocaust, in practice reversing the spirit of 1917 just as Europe’s Jews needed refuge most. Britain’s mandate ended in May 1948 with the birth of the State of Israel.

Legal status and how it is misquoted today

The Balfour Declaration itself is not a binding legal instrument, and no serious historian claims it single-handedly created Israel. Its legal weight comes from what absorbed it: the Mandate for Palestine was a binding act of the League of Nations, and Article 80 of the UN Charter preserved rights that existed under League mandates when the United Nations succeeded it, which is why some legal scholars treat the Mandate’s Jewish national home provisions as still relevant to arguments over Jewish claims to the land. Two misreadings recur constantly in polemic. First, critics often quote the declaration as an unconditional promise of statehood while omitting the “national home” wording and the non-Jewish rights clause entirely, flattening a deliberately hedged sentence into a simple one. Second, it is frequently described as Britain giving away “a land that was not theirs to give,” which mistakes a wartime statement of policy intent for a completed land transfer; Palestine was still Ottoman territory when the letter was written, and the declaration’s substance only became operative once ratified internationally at San Remo and by the League, the normal mechanism by which mandatory powers of that era received and exercised authority over former Ottoman lands.

Chaim Weizmann · The San Remo Resolution, 1920 · The Mandate for Palestine, 1922 · Balfour Declaration glossary entry · The Peel Commission · Theodor Herzl