(1878–1942, was born in Romny) – engineer, politician, entrepreneur, participant in the revolutionary movement, one of the leaders of the Zionist movement, organizers of the Jewish Legion and the American Jewish Congress (1914–1915). He created and headed the Electric Company, which is still operating in Israel. The Vaad Leumi (National Committee, executive body of the Yishuv Assembly of Deputies 1920-1948) was headed for a time. One of the creators of Haganah (together with V. Zhabotynskyi).