Judah Leon Magnes was a prominent Reform rabbi in both the United States and Mandatory Palestine. He is best remembered as a leader in the pacifist movement of the World War I period, his advocacy of a binational Jewish-Arab state in Palestine, and as one of the most widely recognized voices of 20th century American Reform Judaism. Magnes served as the first chancellor of the Hebrew University of Jerusalem (1925), and later as its President (1935–1948).