Introduction
The study of colonialism in Iran during the Qajar and Pahlavi periods, without drawing an ontological distinction between different patterns of colonial domination, has often resulted in reductionist and homogenizing interpretations of the role played by foreign powers. Iran’s historical experience, however, demonstrates that the colonial actors operating within the country—particularly the Western powers (most notably Britain), as well as Tsarist Russia and later the Soviet Union—possessed fundamentally distinct characteristics, objectives, and mechanisms of influence. These differences, in turn, generated profound and enduring consequences for Iran’s political, economic, cultural, and epistemic structures.
Western colonialism in Iran, contrary to interpretations that reduce it to military or political intervention alone, was characterized by a sophisticated, multilayered, and long-term pattern of penetration that simultaneously employed economic, political, and cultural–epistemic mechanisms. Within this framework, domination was not confined to territorial occupation or diplomatic coercion; rather, its principal objective was to transform prevailing modes of perception, redefine collective identity, undermine indigenous epistemic foundations, and reconstruct the semantic order of Iranian society. Support for heterodox intellectual and religious movements, the erosion of religious authority and indigenous elites, penetration into the educational and linguistic systems, the production of discourses of historical denigration, and the propagation of narratives of inherent backwardness can all be understood within the framework of this cultural–epistemic colonialism. This form of colonialism was concerned less with the conquest of territory than with the conquest of minds and systems of meaning.

Materials & Methods
This study adopts an analytical–structural approach to historiography grounded in the French Annales School. By moving beyond the limitations of traditional event-centered historiography, this approach provides a robust analytical framework for examining soft penetration, epistemic transformations, and the enduring mechanisms of domination across multiple temporal and structural levels. Although the Annales School has been subject to significant criticism—including its Eurocentric orientation and its relative neglect of non-European societies—it remains, given the research problem under investigation, the most appropriate analytical framework for the present study.

Discussion & Result
The central problem addressed in this study arises from the fact that a substantial body of Iranian historical and political scholarship has failed to adequately conceptualize the fundamental distinction between Western and Russian colonialism. Instead, both have frequently been subsumed under the broad category of "foreign colonialism." Such an approach overlooks the fact that the cultural and epistemic consequences of Western colonialism were considerably deeper, more enduring, and more complex than the political and economic pressures exerted by Russia. Neglecting this distinction obscures the historical roots of Iran's identity crisis, epistemic rupture, the weakening of indigenous institutions, and the emergence of forms of internal dependency in the country's modern history.
Accordingly, this study seeks to answer the following fundamental question: Why and how was Western colonialism able to employ a comprehensive repertoire of economic, political, and cultural–epistemic mechanisms to penetrate Iranian society, whereas Russian colonialism, owing to its structural and civilizational constraints, remained largely dependent upon economic and political instruments? Addressing this distinction not only contributes to a more nuanced reinterpretation of the history of colonialism in Iran but also provides a more robust framework for understanding contemporary mechanisms of penetration and the reproduction of domination in its new and evolving forms.





Conclusion
Western colonialism in Iran was fundamentally a project of institutional formation. Through the establishment of durable economic, educational, and bureaucratic structures, it reshaped Iran in ways that ensured the preservation of its interests even after the direct withdrawal of British personnel or subsequent changes of government. Rather than relying primarily on territorial occupation, Western colonialism sought to dominate patterns of thought, economic networks, and the structures of political decision-making. By contrast, Russian colonialism remained largely predatory in character. Its domination relied predominantly on coercive power, while its interests were relatively short-term and contingent. Lacking comparable cultural and social depth, Russian influence diminished rapidly following the collapse of the Tsarist regime in 1917. Subsequent Soviet efforts to reconstruct its influence through the Tudeh Party likewise failed to match the structural and soft forms of penetration achieved by the West. The fundamental distinction, therefore, lay in the durability and character of domination: the West established hegemony, whereas Russia relied primarily on occupation; and it is hegemony, rather than occupation, that possesses the capacity to endure for centuries without the continuous deployment of military force.