The violence and disruption in Arab life associated with the founding of Israel and its victory in the 1948 Arab–Israeli War drove increased anti-Jewish sentiment in Iran. This continued until 1953, in part because of the weakening of the central government and strengthening of clergy in the political struggles between the shah and prime minister Mohammad Mossadegh. From 1948 to 1953, about one-third of Iranian Jews, most of them poor, immigrated to Israel. David Littman puts the total figure of Iranian Jews who immigrated to Israel between 1948 and 1978 at 70,000.