Mystery Person of the Month 341

I was born on the 18th of Kislev 5635 (Nov. 27, 1874) in a Russian shtetl. As a chemist, I provided important scientific assistance to the Allied forces during World War I. This work brought me into contact with officials of the British government, and I used the opportunity to promote the cause of Zionism. I played an important role in the development of the Balfour Declaration, which committed the British government to the establishment of a Jewish homeland in Eretz Yisrael. In the 1930s, I created Israel’s foremost scientific research institution, which now bears my name. In 1947, I urged the United Nations to adopt the Partition Plan with these words: “The Lord shall set His hands the second time to recover the remnants of His people … and gather together the dispersed of Judah from the four corners of the earth.” At the end of my career, I served as Israel’s first President.

(Answer is bellow.)

Answer: Chaim Weizmann