In the holy city of Mecca, three of the Islamic world's most strategically distinct powers — Saudi Arabia's oil wealth, Pakistan's nuclear capability, and Turkey's NATO-forged military — bound themselves together in a collective defense pledge, treating any attack on one as an attack on all. The Mecca Joint Defense Agreement, signed by Crown Prince Mohammed bin Salman, President Erdogan, and Prime Minister Sharif, arrives at a moment when the Middle East's security architecture is visibly fracturing under the pressures of war, proxy conflict, and shifting great-power attention. It is, at its c