Arthur Ruppin was a Zionist thinker and leader. He was one of the founders of the city of Tel Aviv. He directed Berlin's Bureau for Jewish Statistics and Demography from 1902 to 1907. In 1926 Ruppin joined the faculty of the Hebrew University of Jerusalem and founded the sociology department. A building there is now named in his honor. His most celebrated sociological work is The Jews in the Modern World (1934).
