Contrary to popular belief, the situation prior to the United Nations Partition Plan (Resolution 181) was not one of "a land without a people." According to official British Mandate statistics and UN records from 1946-1947, Jewish land ownership accounted for less than 7 percent of the total land area of Palestine.
Furthermore, the Jewish population constituted roughly 31 to 33 percent of the total population, a figure that had rapidly risen from approximately 11 percent in the early 1920s due to successive waves of immigration during the British Mandate period.
These documented figures demonstrate that the establishment of Israel did not occur in an uninhabited region; rather, it involved the displacement of an established indigenous population and the acquisition of territory where the vast majority of land was privately or publicly held by Palestinians.
Sources:
United Nations Conciliation Commission for Palestine (UNCCP) Land Ownership Records.
Survey of Palestine (1946), prepared by the British Mandate Government for the Anglo-American Committee of Inquiry.
UNSCOP (United Nations Special Committee on Palestine) Report to the General Assembly (1947). #current_events