Initially two labor parties were founded by immigrants to Palestine of the Second Aliyah (1904-1914): the pacifist and anti-militarist Hapo'el Hatza'ir (Young Worker) party and the Marxist Poale Zion party, with Poale Zion roots.
The Mapai party later became the Israeli Labor Party, which for a number of years was linked with Mapam in the Alignment.