The Iran-Saudi Rivalry

Roots of the Rivalry

The Iran-Saudi competition is often described as a Sunni-Shia conflict, but this framing is incomplete. The rivalry is primarily geopolitical — two major regional powers competing for influence — with sectarian identity serving as a mobilization tool rather than a root cause.

Before 1979, Iran under the Shah and Saudi Arabia were both US-aligned monarchies. They competed for status but were not enemies. The Islamic Revolution upended this arrangement. Ayatollah Khomeini explicitly called for the export of the revolution, challenged the legitimacy of Gulf monarchies, and declared Iran the leader of the entire Muslim world — a direct challenge to Saudi Arabia's claim to Islamic leadership as custodian of Mecca and Medina.

The Iran-Iraq War (1980-1988) hardened the divide. Saudi Arabia and the Gulf states bankrolled Saddam Hussein to the tune of tens of billions of dollars, viewing Iraq as a bulwark against Iranian expansion. Iran never forgave this support for an invasion that killed hundreds of thousands of its citizens. The 1987 Mecca incident, in which Saudi security forces killed over 400 Iranian pilgrims during a hajj protest, severed diplomatic relations for three years.

Proxy Battlegrounds

The post-2003 Middle East became a chessboard for Iran-Saudi competition, with each power backing opposing sides across multiple conflicts.

Iraq: The US invasion in 2003 removed Saddam Hussein's Sunni-minority government and empowered Iraq's Shia majority — a strategic windfall for Iran. Tehran cultivated deep ties with Shia political parties and militias. Saudi Arabia, having lost its Iraqi buffer, watched with alarm as Baghdad tilted toward Tehran.

Lebanon: Hezbollah, Iran's most capable proxy, has been the dominant political and military force in Lebanon since the 2006 war with Israel. Saudi Arabia backed the opposing March 14 coalition, led by the Hariri family. In 2017, Saudi Crown Prince Mohammed bin Salman detained Lebanese Prime Minister Saad Hariri in Riyadh and pressured him to resign on Saudi television — an episode that backfired spectacularly, generating sympathy for Hariri even from Hezbollah supporters.

Yemen: The war that erupted in 2015 became the rivalry's most destructive proxy conflict. Saudi Arabia led a military coalition against the Houthis, a Zaydi Shia movement that Iran supported with weapons, training, and funding. The resulting humanitarian catastrophe — over 150,000 dead and millions facing famine — became a stain on Saudi Arabia's international reputation.

Bahrain: Saudi troops entered Bahrain in 2011 to crush an Arab Spring uprising led by the Shia majority against the Sunni monarchy. Saudi Arabia framed it as countering Iranian subversion; Bahraini protesters said their grievances were about domestic discrimination.

Beyond the Sectarian Frame

It is essential to understand that the Iran-Saudi rivalry is instrumentally sectarian, not essentially so. Iran has supported Sunni groups when strategically useful — it maintained ties with Sunni Hamas for years and supported Sunni insurgents in Afghanistan against the Taliban (which was backed by Saudi Arabia and Pakistan). Saudi Arabia has cooperated with Shia-majority Iraq's government when it served its interests.

The sectarian framing serves both regimes. For Iran, casting itself as the protector of oppressed Shia communities across the region gives it a natural constituency and a moral justification for intervention. For Saudi Arabia, framing Iranian influence as a Shia conspiracy helps rally Sunni Arab support and obscures the domestic political grievances that drive opposition in countries like Bahrain.

For civilians caught in proxy conflicts — in Yemen, Syria, Iraq, and Lebanon — the Iran-Saudi rivalry has been catastrophic. Their countries became battlegrounds for a competition that neither Tehran nor Riyadh was willing to fight on its own soil. Understanding this rivalry is essential for understanding virtually every major conflict in the modern Middle East.