What methods have resulted in the greatest contribution to global security?

Key methods contributing to global security include diplomacy, multilateral treaties, and international cooperation. Diplomatic efforts, such as negotiations and dialogue between nations, help resolve conflicts peacefully. Multilateral treaties, like the Non-Proliferation Treaty (NPT) and various arms control agreements, establish frameworks for disarmament and non-proliferation. Additionally, international organizations, such as the United Nations, play a crucial role in promoting collective security and facilitating cooperation among nations to address global threats.