November 2 marks the 102nd anniversary of the Balfour Declaration, about which I have previously written at length in Mosaic. There, I focused on how the actors who brought the declaration into being assured it would have international legitimacy, and on the tragic failure of Britain and the international community to keep their promise to the Jewish people in the aftermath. Here I want to reflect on an overlooked rationale proposed by the Zionist leader Chaim Weizmann to give the declaration some staying power after the world war would finally end.