Key Terms & Concepts — UPSC Mains
No First Use (Nuclear Doctrine)
"India's declared policy of not being the first to launch nuclear weapons, using them only in retaliation."
No First Use (NFU) is a core pillar of India's nuclear doctrine, formally articulated in 2003. It commits India to not initiating a nuclear strike and to using nuclear weapons only in retaliation against a nuclear attack on Indian territory or on Indian forces anywhere. The doctrine pairs NFU with a posture of credible minimum deterrence and the promise of massive retaliation designed to inflict unacceptable damage, with the political leadership through the Nuclear Command Authority controlling any decision to use nuclear weapons.
GS3 (security, defence, nuclear doctrine) and GS2 (India's strategic posture). Prelims tests the 2003 doctrine, credible minimum deterrence and the Nuclear Command Authority. Mains debates whether NFU should be retained or made ambiguous. Anchor: India has consistently reaffirmed NFU and credible minimum deterrence as a responsible nuclear power, even as periodic strategic debate questions its future flexibility.
- 1 India will not be the first to use nuclear weapons
- 2 Nuclear weapons reserved only for retaliation against a nuclear attack
- 3 Formally articulated in India's nuclear doctrine of 2003
- 4 Paired with credible minimum deterrence and massive retaliation
- 5 Decision vested in the political leadership via the Nuclear Command Authority
- 6 Exception noted for retaliation to major biological or chemical attacks
India continued to project itself as a responsible nuclear power in 2026 by reaffirming No First Use and credible minimum deterrence, even amid debate on strategic ambiguity.
