I introduce the topic, theme, central argument of the study, and its setting in Gulf petro-monarchies. I discuss the relevant scholarly literature, especially as it concerns ways in which religion (and specifically, Islam) has been used by political actors to advance particular interests. I provide a detailed elaboration of the argument and its various parts, as well as the method of analysis and justification for the choice of cases. I then discuss the context and cases in greater detail, with attention to key features of the historical development of the petro-monarchies from their pre-oil contact with the British imperial power, the arrival of oil companies, the importation of labor, the definition of borders and emergence of “modern” states. I illustrate noteworthy structural peculiarities of each of the four states. Finally, I outline the architecture of the manuscript, with an overview of each chapter.