What was the Balfour Declaration?

The Balfour Declaration was a brief letter issued on 2 November 1917. Its key passage was just 67 words long. In it, British Foreign Secretary Arthur James Balfour wrote to Baron Walter Rothschild, a leader of the British Jewish community. The letter stated that the British government viewed 'with favour the establishment in Palestine of a national home for the Jewish people.' It also pledged to 'use their best endeavours to facilitate the achievement of this object.'

However, the declaration also included an important condition. It specified that 'nothing shall be done which may prejudice the civil and religious rights of existing non-Jewish communities in Palestine.' At the time, Arabs made up roughly 90 percent of Palestine's population. As a result, this dual commitment proved impossible to fulfil. In practice, large-scale Jewish immigration inevitably altered a demographic balance that had existed for centuries.

The declaration was not a treaty or a law. Instead, it was a policy statement by one government, made without consulting the people who lived there. Nevertheless, it carried enormous political weight because Britain was on the verge of conquering Palestine from the Ottoman Empire. According to the UK National Archives, the letter therefore shaped the region's political future for the next century.

Britain issued the Balfour Declaration during World War One, when strategy shaped every diplomatic move. Several factors converged to produce this commitment.

Wartime strategy

By 1917, the war had reached a critical stage. Britain wanted support from Jewish communities in the United States and Russia, because both were vital to the Allied war effort. British officials also believed that Jewish leaders held significant influence in those countries. This assumption was often incorrect, but it nevertheless shaped policy. In addition, Britain wanted to prevent France from gaining sole influence over Palestine. Both powers saw the territory as strategically important due to its location near the Suez Canal.

The Zionist movement

Theodor Herzl founded the political Zionist movement in the 1890s. It lobbied European governments for support for a Jewish homeland. Chaim Weizmann, a prominent Zionist leader and chemist, also contributed to the British war effort. Furthermore, he had direct access to senior politicians. His personal relationship with Balfour and Prime Minister David Lloyd George consequently helped secure the declaration. According to Encyclopaedia Britannica, Weizmann's lobbying was one of the war's most effective diplomatic campaigns.

Conflicting promises

Critically, the Balfour Declaration contradicted other commitments Britain had already made. In the 1915-1916 Hussein-McMahon Correspondence, Britain promised Sharif Hussein of Mecca that Arab lands freed from Ottoman rule would gain independence. Meanwhile, the 1916 Sykes-Picot Agreement had secretly divided Ottoman territories between Britain and France. As a result, Palestine was subject to three overlapping and incompatible sets of promises.

After World War One ended in 1918, Britain took control of Palestine. The Balfour Declaration was then incorporated into the British Mandate for Palestine. The League of Nations formally approved this arrangement in 1922. As a result, the declaration gained legal authority it had previously lacked.

The Mandate required Britain to facilitate Jewish immigration while also safeguarding the existing population's rights. However, these goals conflicted sharply in practice. Jewish immigration grew during the 1920s and accelerated further in the 1930s because Jews fled persecution in Europe, particularly after the Nazis came to power in Germany.

Arab Palestinians consequently viewed the growing immigration with alarm. They had not been consulted about the declaration. Furthermore, they rejected the idea that an external power could promise their homeland to another people. Tensions therefore escalated throughout the Mandate period. Violence erupted during the 1920 Nebi Musa riots, the 1929 Palestine riots, and the Arab Revolt of 1936-1939.

Finally, by the late 1930s, Britain tried to limit Jewish immigration through the 1939 White Paper. This effectively reversed the Balfour Declaration's commitments and pleased neither side. The trajectory from the declaration through the Mandate led directly to the events of 1948 and the modern conflict.

The Balfour Declaration remains one of the most debated documents in modern history. Different communities interpret it in fundamentally different ways. Therefore, understanding these perspectives is essential to understanding the conflict that followed.

For many Israelis and supporters of Israel, the declaration was the first major-power recognition of a Jewish right to a national homeland. It acknowledged the historical connection between the Jewish people and Palestine. It also provided a foundation for the international legitimacy that led to the State of Israel in 1948.

In contrast, for Palestinians and much of the Arab world, the declaration was an act of colonial imposition. Britain promised a land that was not its own without consulting the people who lived there. In the Palestinian view, no government had the right to dispose of another people's homeland. Consequently, in 2017, Palestinian Authority President Mahmoud Abbas called on Britain to apologise. The British government nevertheless declined.

Historians also debate the motivations behind the declaration. Was it driven by strategic calculation, genuine sympathy for Zionism, or antisemitic assumptions about Jewish influence? Most scholars agree that all three factors played a role. The United Nations Information System on the Question of Palestine documents how the consequences unfolded.

What is not contested, however, is the declaration's impact. The 67-word letter set in motion a chain of events that continues to shape the history of Palestine and the wider Middle East. Immigration, resistance, partition, war, and displacement all followed from this single document.