Article 1 and the Architecture of Peace: When Treaty Obligations Meet Preemptive Doctrine
The North Atlantic Treaty, signed in Washington on April 4, 1949, opens with a single binding obligation before any mention of mutual defence, collective security, or military cooperation.
Article 1 states that parties undertake "to settle any international dispute in which they may be involved by peaceful means in such a manner that international peace and security and justice are not endangered, and to refrain in their international relations from the threat or use of force in any manner inconsistent with the purposes of the United Nations."