This thesis assesses the Gulf states’ perceptions towards US hegemony security in the Persian/Arabian Gulf. A number of questions are asked regarding security and stability in the Gulf, the tools, means and objectives of the USA in the region, regional powers and their role in achieving stability in the Gulf. Special references is given to the perspectives of the Gulf Cooperation Council (GCC) states, Iraq and Iran regarding regional security, stability, the role of US hegemony, and their roles in building a new security system in the region. Moreover questions addressed include the occupation of Iraq by the USA and how it has impacted the Gulf region and the capabilities of the Gulf states to build a regional security system independent of US protection. The aim of this study is to provide a conceptual foundation for a discussion about the future shape of security and stability arrangements in the Gulf. Secondly, this research aims to analyse the role of the USA in the regional security complex, its key interests in the region, and its means to achieving its objectives there. Finally, this thesis examines the perceptions of the GCC states, Iraq and Iran toward the role of the USA and its hegemony in the Gulf. Furthermore, this research project also aims to study the failure of the region's states to develop a regional security regime and their perceptions of this failure