 The ideas of Peter Kropotkin and Leo Tolstoy had remarkable influence on famous exponents of some Left Zionists, such as Yitzhak Tabenkin, Berl Katznelson, and Mark Yarblum.The organizer of the Jewish self-defense movement, Joseph Trumpeldor, who later became a hero of the Israeli right, was very close to anarcho-syndicalism and even declared himself an anarcho-communist.Anarchism has also had some influence on the constitution of socio-political movements such as Poalei Zion, Tzeirei Zion, HeHalutz, and Gdud HaAvoda.