Luíza Cerioli is a Political Science Researcher at the University of Kassel.

CHOICE Recommended: Advanced Undergraduates Through Faculty.

• Introduction1 The Persian Gulf Regional System: Iran, Saudi Arabia, and the United States as regional actors 2 Neoclassical Realism and the Iran–US–Saudi Arabia triangle3 The ménage à trois triangle (1969 to 1979): The Twin Pillar Diplomacy revisited4 The stable marriage triangle (1979 to 1989): Consolidation of the Carter Doctrine5 The romantic triangle (1989 to 2003): The Saudi–Iranian rapprochement6 The stable marriage revised (2003 to 2014): Establishing a new rivalryConclusion

Luíza Cerioli is a Political Science Researcher at the University of Kassel.

CHOICE Recommended: Advanced Undergraduates Through Faculty.

• Introduction1 The Persian Gulf Regional System: Iran, Saudi Arabia, and the United States as regional actors 2 Neoclassical Realism and the Iran–US–Saudi Arabia triangle3 The ménage à trois triangle (1969 to 1979): The Twin Pillar Diplomacy revisited4 The stable marriage triangle (1979 to 1989): Consolidation of the Carter Doctrine5 The romantic triangle (1989 to 2003): The Saudi–Iranian rapprochement6 The stable marriage revised (2003 to 2014): Establishing a new rivalryConclusion

Luíza Cerioli is a Political Science Researcher at the University of Kassel.

CHOICE Recommended: Advanced Undergraduates Through Faculty.

• Introduction1 The Persian Gulf Regional System: Iran, Saudi Arabia, and the United States as regional actors 2 Neoclassical Realism and the Iran–US–Saudi Arabia triangle3 The ménage à trois triangle (1969 to 1979): The Twin Pillar Diplomacy revisited4 The stable marriage triangle (1979 to 1989): Consolidation of the Carter Doctrine5 The romantic triangle (1989 to 2003): The Saudi–Iranian rapprochement6 The stable marriage revised (2003 to 2014): Establishing a new rivalryConclusion