Weizmann made very clear in his autobiography that the failure of the international Zionist movement (between the wars) to encourage all Jews to act decisively and efficiently in great enough numbers to migrate to the Jerusalem area was the real cause for the call for a Partition deal. A deal on Partition was first formally mentioned in 1936 but not finally implemented until 1948. Again, Weizmann blamed the Zionist movement for not being adequate during the best years of the British Mandate.