The Mecca Joint Defense Agreement and the prospect of an Arab-Muslim collective security architecture

Abstract

On 7 August 2026, Saudi Arabia, Türkiye and Pakistan signed a joint defence agreement in Mecca stipulating that an armed attack against any signatory would be treated as an attack against all parties. Concluded against the backdrop of the war launched on 28 February 2026 by the United States and Israel against Iran, the agreement has been portrayed by several commentators as the outline of an "Arab-Muslim NATO." This article offers a geopolitical analysis of that hypothesis, situating the Mecca agreement within the longer genealogy of collective-defence attempts. Drawing on balance-of-threat and bandwagoning theory alongside constructivist approaches to transnational Islamic identity, the article argues that the Mecca agreement represents less a structural rupture than a tactical, conjunctural realignment whose institutional durability remains highly uncertain considering historical precedent.