The Middle East Ceasefire Collapse That Ends the Post-Cold War Order

President Trump’s July 2026 declaration that the U.S.–Iran ceasefire is dead has ignited a widening war between the U.S., Israel, and Iran, triggering a systemic rupture in global alliances, energy security, and nuclear deterrence. This escalation, coinciding with the expiry of New START and volatile tariff policy, marks the definitive end of the post–Cold War international order and accelerates a multipolar reality defined by strategic ambiguity and regional blocs.