This study provides a general outline of Palestinian population growth between 1948 and 1987 and then focuses on the town of Nablus for a detailed analysis of the main aspects of Palestinian migration and high rates of natural increase. The author shows how the recession that struck the Arab oil economies in the early 1980s, by slowing down the migratory movement, shut off the valve that had afforded the Palestinians in the West Bank and Gaza relief from economic pressures.