Oil has always been thought of as the traditional cause of conflict in the Middle East past and present. Since the first Gulf oil well gushed in Bahrain in 1932, countries have squabbled over borders in the hope that ownership of a patch of desert or a sand bank might give them access to new riches. No longer. Now, most borders have been set, oil fields mapped and reserves accurately estimated – unlike the water resources, which are still often unknown. WATER is taking over from oil as the likeliest cause of conflict in the Middle East.