Hakibbutz Haartzi came into being as a settlement federation in 1927. Its ideological foundations are Zionism and socialism. It advocates the combination of settlement with the class struggle and for many years demanded of its members total identification with the kibbutz federation's political philosophy, a concept that was termed collective ideology. However, in the course of time, the intensity of this collective ideology diminished, and today some members of Hakibbutz Haartzi publicly identify with other political parties (noticeably on the left). It was from this kibbutz movement that Hashomer Hatzair developed, and this party founded with Sia Bet in 1949 and the Mapam (United Workers Party).
Historical Dictionary of Israel. Bernard Reich David H. Goldberg. Edited by Jon Woronoff..