Oil Production

All of the major oil-producing areas are by major bodies of water (rivers, persian gulf), and this can easily lead to conflict.  This can lead to war because countries will want to take over the oil areas so they can control the oil production and so that they can control the waterways.  It would cost the countries MUCH less in shipping fees if they had control of the waterways, and they would make a great deal of profit from the production of oil.  Therefore, the location of oil production sites can, will, and have resulted in conflicts.