After Chap. 1 outlined the theoretical framework specifying the need to explore geopolitical structures as well as cultures in the attempt to understand foreign policy, this chapter will explore Iran’s geopolitical imaginations, or geopolitical cultures, as predicated upon the country’s various political cultures, or politico-ideological formations, and their respective worldviews. Therefore, Part A will sketch out the historical roots of modern Iranian political culture, which was mainly shaped through the internal and external (mainly the encounter with colonialism) situation, in order to identify the most important politico-ideological formations (namely nationalism, Islamism and socialism). Then, the fate of these political cultures shall be briefly monitored throughout the initial years after the 1979 Iranian Revolution, where a process of Islamization took hold. Part B will provide an outline of the geopolitical imaginations (engâreh-e géopolitiques) that each of the afore-mentioned politico-ideological formations exhibit: namely nationalism, Islamism and Third-Worldism (Tiers-Mondisme). In doing so, the section highlights the geopolitical significance of an identity marker.