Iran Before the Revolution — and the Future Now Being Fought Over

The conflict between Iran and the United States and Israel arrived only weeks after the Iranian regime violently suppressed nationwide protests in January, when security forces reportedly killed thousands of demonstrators in one of the largest crackdowns since the Islamic Revolution.

For much of the 20th century, Iran stood as one of Washington’s most important partners in the Middle East. The relationship began to take shape during the early decades of the century and expanded significantly during the reign of the Pahlavi dynasty. When Reza Shah Pahlavi came to power in 1925, Iran faced deep internal fragmentation and persistent foreign interference. His government sought to consolidate authority and build the foundations of a modern state. A national army replaced tribal forces, national institutions expanded, and the central government extended its presence across the country.

Reza Shah’s son, Mohammad Reza Pahlavi, succeeded him in 1941 and ruled for roughly four decades. During this period, Iran developed close strategic ties with the United States and other Western powers.

During the Second World War, the country served as a critical supply corridor for Allied aid to the Soviet Union, a route known as the Persian Corridor. After the war, this same geography continued to define the country’s importance. Sharing a border with the Soviet Union during the height of the Cold War positioned Iran as a key barrier to communist expansion in the Middle East.

By the 1970s, Iran had become one of the region’s strongest military powers and a central pillar of the Western security architecture.

In 1973, Iranian forces intervened in Oman to help defeat the Marxist-backed Dhofar rebellion, preventing the establishment of a Soviet-aligned foothold on the Arabian Peninsula. Actions such as these reinforced Iran’s role as a stabilizing partner within the Western alliance system.

That geopolitical alignment ended abruptly with the Iranian Revolution of 1979. The overthrow of the monarchy and the rise of Ruhollah Khomeini transformed Iran’s political system and its place in the world. The new Islamic Republic rejected the Western orientation of the Shah’s government and instead defined itself in opposition to the United States and its regional allies.

Beginning with the hostage crisis that followed the revolution, relations between Tehran and Washington entered a prolonged period of confrontation.

Over the following decades, Iran positioned itself as the ideological center of a revolutionary political movement that challenged the Western presence in the Middle East. Iranian leaders frequently framed the country’s role as one of resistance to American and Israeli influence, while expanding political and military relationships with armed movements across the region.

The consequences of the revolution have shaped Middle Eastern politics for almost half a century.

Iran’s leadership has repeatedly been accused by Western governments of supporting militant groups and projecting influence across regional conflicts. But the events of 2026 may represent the most serious disruption to the Islamic Republic’s political order in decades.

In the days following the strike that killed Supreme Leader Khamenei, Iranian state authorities announced that Mojtaba Khamenei, the late supreme leader’s son, had been chosen as the country’s new supreme leader, marking one of the most consequential leadership transitions in the history of the Islamic Republic. A hereditary-style transfer of power within a system that has long presented itself as a revolutionary republic could deepen internal tensions at a moment when the state is already confronting war abroad and dissatisfaction at home.

If the current conflict weakens the revolutionary political system established in 1979, the geopolitical orientation of Iran could once again become a central question for the region. Such a shift could reshape regional alliances and potentially reduce one of the most enduring sources of instability in the region.

History rarely moves in straight lines. Political orders that appear permanent can unravel quickly when internal unrest and external pressure collide. Nearly half a century ago, the Iranian Revolution transformed one of America’s closest regional partners into a revolutionary adversary.

The situation now unfolding across Iran raises the possibility that the geopolitical legacy of that revolution may once again be entering a period of profound uncertainty.