Why did India, Pakistan, and Israel not join the Nuclear Non-proliferation Treaty?

India, Pakistan, and Israel have not signed the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) primarily because the treaty is viewed as inherently unequal, as it permits established nuclear-weapon states to retain their arsenals while requiring others to forgo them.1

• India: India has long maintained that the NPT is discriminatory. It pursued its own nuclear program to ensure national security, conducting its first test in 1974 and declaring itself a nuclear power in 1998. India’s policy has historically balanced the pursuit of nuclear capability with a stated commitment to global disarmament.12
• Pakistan: Pakistan’s refusal to sign is rooted in its regional security concerns, specifically its rivalry with India. Following India’s 1974 test, Pakistan accelerated its own nuclear program to establish a deterrent, eventually conducting its own tests in 1998.34
• Israel: Israel maintains a policy of "nuclear ambiguity," neither confirming nor denying the possession of nuclear weapons. By not signing the NPT, Israel avoids the international inspections and regulations mandated by the treaty, allowing it to preserve its strategic posture in the region without formal acknowledgment of its arsenal.567

It is a fundamental ethical principle that international security should be pursued through transparent, equitable, and cooperative frameworks rather than through the proliferation of weapons of mass destruction.