WWII and its consequences served to bring a new era of extensive cooperation between the United Kingdom and the United States, leading to the birth of the Anglo-American special relationship (AASR). However, the two countries’ global widespread interests led to inevitable conflicts of interest, mostly favoring the US. Here, the question arises: Why did postwar Britain maintain its attachment to the AASR in times of conflicting interest with America? The paper, motivated by Gidden’s definition of ontological security, discusses that the consequences of WWII not only generated for the UK physical security concerns, but also ontological insecurity. In this respect, postwar Britain, accepting an inferior role, sought a special relationship with the US to consolidate this mutual partnership in order to mitigate its ontological insecurity in the postwar world order. The paper then, by investigating two cases of British-American conflicting interests in Iran, and raising a material-ideational debate, aims to identify the advantages of ontological security theory in explaining Britain’s “mechanism of tolerance” in preserving the AASR. Otherwise stated, through the proposed conceptual framework, the paper explores the way in which ontological security needs shape the postwar UK’s behaviors to prioritize its close relations with the US, regardless of the costs.
