Benzion Netanyahu studied medieval history at Hebrew University in Jerusalem. During his studies, Netanyahu became active in Revisionist Zionism, a movement of people who had split from their mainstream Zionist counterparts, believing those in the mainstream were too conciliatory to the British authorities governing Palestine, and espousing a more militant, right-wing version of Jewish nationalism than the one advocated by the Labour Zionists who led Israel in its early years. The revisionists were led by Jabotinsky, whose belief in the necessity of an “iron wall” between Israel and its Arab neighbors had influenced Israeli politics since the 1930s.