Comprising 65-70% of the world's oil reserves, the Gulf States (Saudi Arabia, Iran, Iraq, Kuwait, UAE and Qatar) are key countries for the solutions to the energy supply matters of the world. Free flow of oil to the world markets from Gulf region is an indispensable part of the major security issues. The Middle East has had mainly security related problems such as Arab-Israeli wars and conflicts, Arab-Iranian war and conflicts, Arab-Arab war and conflicts, US-Gulf wars and conflicts and more recently radicalism and terrorist attacks. Energy supply security requires the enhancement of the peace and cooperation between countries instead of competition. Preventive policy approaches are more suitable to address energy supply matters. Preventive strategy might be possible with the active participation of NATO within the "out of area" type operations to the Middle East and quite possibly indirectly to the Asia-Pacific regions. Religious and ethnic radicalism and terrorist attacks has also direct effects over oil supply security matters. (c) 2006 Elsevier Ltd. All rights reserved.