Rabbi and Jewish leader. Though ordained as a Reform rabbi, Magnes was a traditionalist and became close to Solomon Schechter. He was instrumental in helping establish the American Jewish Committee together with his brother-in-law Louis Marshall. Magnes was a strong Zionist who believed in Jewish defense while accepting the unique role of Zionism as proposed by Ahad Ha'am. In 1922 he immigrated to Eretz Israel and helped establish the Hebrew University where he served as chancellor from 1925-35 and first president (1935-48) until his death.